{"product_id":"totalhome-tthwfp-wireless-7-day-programmable-room-thermostat-replaces-honeywell-cm927-cm921-cm727","title":"Totalhome TTHWFP Wireless 7 Day Programmable Room Thermostat - Replaces Honeywell CM927 CM921 CM727","description":"\u003cdiv style=\"font-size:16px; font-family:Arial,sans-serif; color:#222; max-width:900px; margin:0 auto; line-height:1.6;\"\u003e\n\n  \u003cp style=\"margin:0 0 18px;\"\u003eThe \u003cstrong\u003eTotalhome TTHWFP\u003c\/strong\u003e is a \u003cstrong\u003ewireless 7-day programmable room thermostat\u003c\/strong\u003e manufactured by Resideo — the same engineering team behind the trusted Honeywell Home range. It is the \u003cstrong\u003edirect replacement for the Honeywell CM927, CMS927, CM727, and CM921\u003c\/strong\u003e and pairs straight to an existing \u003cstrong\u003eHoneywell BDR91 relay box\u003c\/strong\u003e without rewiring. With \u003cstrong\u003efour programmable heating periods per day\u003c\/strong\u003e, AUTO\/MAN\/OFF operating modes, a \u003cstrong\u003ebuilt-in service reminder\u003c\/strong\u003e, and full \u003cstrong\u003eBoiler Plus compliance\u003c\/strong\u003e for on\/off boiler control, the TTHWFP delivers precise and flexible heating management in a compact, battery-powered unit. \u003cstrong\u003eMade in the UK and Europe\u003c\/strong\u003e and backed by a \u003cstrong\u003e3-year warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\n  \u003c!-- Stat strip --\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; gap:12px; margin:0 0 24px;\"\u003e\n    \u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#fff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n      \u003cdiv style=\"font-size:20px; font-weight:700;\"\u003e7-Day\u003c\/div\u003e\n      \u003cdiv style=\"font-size:12px; margin-top:4px;\"\u003eIndependent Schedule\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#fff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n      \u003cdiv style=\"font-size:20px; font-weight:700;\"\u003e4 Periods\u003c\/div\u003e\n      \u003cdiv style=\"font-size:12px; margin-top:4px;\"\u003ePer Day\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#fff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n      \u003cdiv style=\"font-size:20px; font-weight:700;\"\u003eWireless\u003c\/div\u003e\n      \u003cdiv style=\"font-size:12px; margin-top:4px;\"\u003eNo Wiring Required\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#fff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n      \u003cdiv style=\"font-size:20px; font-weight:700;\"\u003eBoiler+\u003c\/div\u003e\n      \u003cdiv style=\"font-size:12px; margin-top:4px;\"\u003eCompliant\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"flex:1; min-width:120px; background:#008377CF; color:#fff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n      \u003cdiv style=\"font-size:20px; font-weight:700;\"\u003e3 Years\u003c\/div\u003e\n      \u003cdiv style=\"font-size:12px; margin-top:4px;\"\u003eWarranty\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- Amber: legacy receiver warning --\u003e\n  \u003cdiv style=\"background:#fffbf0; border-left:4px solid #e67e22; border-radius:6px; padding:14px 16px; margin:0 0 16px;\"\u003e\n    \u003cstrong style=\"color:#e67e22;\"\u003e⚠ Compatibility Warning — Legacy Receivers\u003c\/strong\u003e\u003cbr\u003e\n    The \u003cstrong\u003eolder Honeywell HC60NG and R6660D (rectangular) wireless receivers are not compatible\u003c\/strong\u003e with the TTHWFP and will cause persistent wireless communication faults. These receiver models \u003cstrong\u003emust be replaced\u003c\/strong\u003e with the supplied wireless relay box included in this pack. The TTHWFP binds directly to existing \u003cstrong\u003eBDR91\u003c\/strong\u003e receivers without issue.\n  \u003c\/div\u003e\n\n  \u003c!-- Red: installer note --\u003e\n  \u003cdiv style=\"background:#fff5f5; border-left:4px solid #c0392b; border-radius:6px; padding:14px 16px; margin:0 0 16px;\"\u003e\n    \u003cstrong style=\"color:#c0392b;\"\u003e⚠ Installer Notice\u003c\/strong\u003e\u003cbr\u003e\n    The wireless relay box operates at \u003cstrong\u003e230 V AC mains voltage\u003c\/strong\u003e. Wiring of the relay box must be carried out by a \u003cstrong\u003ecompetent person\u003c\/strong\u003e. Switch off the mains power at the circuit breaker before accessing any wiring.\n  \u003c\/div\u003e\n\n  \u003c!-- Teal: in-box contents --\u003e\n  \u003cdiv style=\"background:#e6f4f3; border-left:4px solid #008377; border-radius:6px; padding:14px 16px; margin:0 0 24px;\"\u003e\n    \u003cstrong style=\"color:#005c54;\"\u003eⓘ What's in the Box\u003c\/strong\u003e\u003cbr\u003e\n    1 × Wireless programmable room thermostat  |  1 × Wireless relay box (SPDT 5(3) A @ 230 V AC)  |  2 × AA batteries  |  Table stand  |  Wall-mount kit  |  Installation guide\n  \u003c\/div\u003e\n\n  \u003c!-- Feature cards --\u003e\n  \u003cdiv style=\"background:#008377CF; color:#fff; padding:10px 16px; border-radius:6px 6px 0 0; font-weight:700; font-size:15px; margin-bottom:0;\"\u003eKey Features\u003c\/div\u003e\n  \u003cdiv style=\"display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:14px; background:#e6f4f3; border:1px solid #c8e6e3; border-top:none; border-radius:0 0 6px 6px; padding:16px; margin:0 0 28px;\"\u003e\n\n    \u003cdiv style=\"background:#f0faf9; border:1px solid #c8e6e3; border-radius:6px; padding:16px;\"\u003e\n      \u003cdiv style=\"font-weight:700; color:#008377; border-bottom:2px solid #008377; padding-bottom:6px; margin-bottom:10px;\"\u003eWireless Installation — No Rewiring\u003c\/div\u003e\n      \u003cp style=\"margin:0; font-size:14px;\"\u003eThe TTHWFP communicates wirelessly with the supplied relay box, so \u003cstrong\u003ethere is no need to run a wiring cable between the thermostat and the boiler\u003c\/strong\u003e. Place the thermostat wherever best represents the room temperature — on a shelf, wall-mounted, or on the table stand provided.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9; border:1px solid #c8e6e3; border-radius:6px; padding:16px;\"\u003e\n      \u003cdiv style=\"font-weight:700; color:#008377; border-bottom:2px solid #008377; padding-bottom:6px; margin-bottom:10px;\"\u003e7-Day \/ 4-Period Programming\u003c\/div\u003e\n      \u003cp style=\"margin:0; font-size:14px;\"\u003eSet a \u003cstrong\u003efully independent heating schedule for every day of the week\u003c\/strong\u003e, with up to \u003cstrong\u003efour time-and-temperature periods per day\u003c\/strong\u003e (P1–P4). The default schedule (e.g. 6:30 @ 21 °C, 8:00 @ 16 °C, 18:00 @ 21 °C, 22:30 @ 16 °C) can be customised to match any household routine. Use the \u003cstrong\u003eCopy Day function\u003c\/strong\u003e to replicate one day's programme across other days quickly.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9; border:1px solid #c8e6e3; border-radius:6px; padding:16px;\"\u003e\n      \u003cdiv style=\"font-weight:700; color:#008377; border-bottom:2px solid #008377; padding-bottom:6px; margin-bottom:10px;\"\u003eAUTO \/ MAN \/ OFF Modes\u003c\/div\u003e\n      \u003cp style=\"margin:0; font-size:14px;\"\u003eSwitch between \u003cstrong\u003eAUTO\u003c\/strong\u003e (follows programmed schedule), \u003cstrong\u003eMAN\u003c\/strong\u003e (holds a manually set temperature until changed), and \u003cstrong\u003eOFF\u003c\/strong\u003e (heating off). In AUTO mode, a \u003cstrong\u003etemporary override\u003c\/strong\u003e adjusts the temperature until the next scheduled period; in MAN mode, overrides are permanent until manually changed. A \u003cstrong\u003e+1 hour override\u003c\/strong\u003e is also available for quick one-off boosts.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9; border:1px solid #c8e6e3; border-radius:6px; padding:16px;\"\u003e\n      \u003cdiv style=\"font-weight:700; color:#008377; border-bottom:2px solid #008377; padding-bottom:6px; margin-bottom:10px;\"\u003eBuilt-in Service Reminder\u003c\/div\u003e\n      \u003cp style=\"margin:0; font-size:14px;\"\u003eAn \u003cstrong\u003eon-screen service reminder alert\u003c\/strong\u003e prompts the user when the boiler is due for its annual service — a useful feature for landlords, letting agents, and homeowners who want to stay on top of boiler maintenance without keeping a separate calendar reminder.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9; border:1px solid #c8e6e3; border-radius:6px; padding:16px;\"\u003e\n      \u003cdiv style=\"font-weight:700; color:#008377; border-bottom:2px solid #008377; padding-bottom:6px; margin-bottom:10px;\"\u003ePermanent Programme Memory\u003c\/div\u003e\n      \u003cp style=\"margin:0; font-size:14px;\"\u003eThe \u003cstrong\u003ebuilt-in memory retains the full user programme indefinitely\u003c\/strong\u003e, even when batteries are removed or go flat. There is no need to reprogram the thermostat after a battery change — the schedule, settings, and time are all preserved.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9; border:1px solid #c8e6e3; border-radius:6px; padding:16px;\"\u003e\n      \u003cdiv style=\"font-weight:700; color:#008377; border-bottom:2px solid #008377; padding-bottom:6px; margin-bottom:10px;\"\u003eDirect Drop-In Replacement\u003c\/div\u003e\n      \u003cp style=\"margin:0; font-size:14px;\"\u003eA \u003cstrong\u003econfirmed direct replacement for Honeywell CM927, CMS927, CMS927B1049, CM721, CM727, and CM921\u003c\/strong\u003e room units. Pairs to an existing \u003cstrong\u003eHoneywell BDR91 relay\u003c\/strong\u003e with no additional configuration — or use the included relay box as a fresh installation. Ideal for upgrading ageing wireless thermostats with minimum disruption.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- Spec table --\u003e\n  \u003cdiv style=\"background:#008377CF; color:#fff; padding:10px 16px; border-radius:6px 6px 0 0; font-weight:700; font-size:15px;\"\u003eTechnical Specifications\u003c\/div\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin:0 0 28px; font-size:14px;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; width:42%; border-bottom:1px solid #c8e6e3;\"\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003eTTHWFP\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eThermostat Power Supply\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003e2 × AA batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eRelay Box Power Supply\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003e230 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eRelay Box Contact Rating\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003eSPDT, 5(3) A @ 230 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eProgramming\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003e7-day, up to 4 periods per day\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eOperating Modes\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003eAUTO \/ MAN \/ OFF; +1 hour override\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eThermostat Dimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003e95 mm × 134 mm × 29 mm (without stand)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eRelay Box Dimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003e92 mm × 96 mm × 34 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eReplaces\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003eHoneywell CM927, CMS927, CMS927B1049, CM721, CM727, CM921\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eCompatible Relay\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003eHoneywell BDR91 (direct bind)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eBoiler Plus Compliance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003eYes — on\/off boiler control\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eCountry of Manufacture\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003eUK and Europe\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600; border-bottom:1px solid #c8e6e3;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px; border-bottom:1px solid #c8e6e3;\"\u003e3 years\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px; font-weight:600;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eResideo (TotalHome)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003c!-- FAQ --\u003e\n  \u003cdiv style=\"background:#008377CF; color:#fff; padding:10px 16px; border-radius:6px 6px 0 0; font-weight:700; font-size:15px;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n  \u003cdiv style=\"border:1px solid #c8e6e3; border-top:none; border-radius:0 0 6px 6px; margin:0 0 28px; overflow:hidden;\"\u003e\n\n    \u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\n      \u003csummary style=\"background:#e6f4f3; padding:12px 16px; font-weight:600; cursor:pointer; list-style:none;\"\u003eWill the TTHWFP work with my existing Honeywell wireless receiver?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:12px 16px; font-size:14px;\"\u003eThe TTHWFP pairs directly to a \u003cstrong\u003eHoneywell BDR91\u003c\/strong\u003e receiver without any additional steps. However, the \u003cstrong\u003eolder HC60NG and R6660D (rectangular) wireless receivers are incompatible\u003c\/strong\u003e — if you have one of these, you must swap it for the relay box supplied in the TTHWFP pack. The pack includes a relay box as standard, so even if your existing BDR91 is kept in place, you have a spare relay box available.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\n      \u003csummary style=\"background:#e6f4f3; padding:12px 16px; font-weight:600; cursor:pointer; list-style:none;\"\u003eWill I lose my heating programme if the batteries run out?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:12px 16px; font-size:14px;\"\u003eNo. The TTHWFP has \u003cstrong\u003ebuilt-in non-volatile memory that stores the programme indefinitely\u003c\/strong\u003e, regardless of battery status. When you replace the batteries, the thermostat will resume with all your settings and schedule intact. The display shows a \u003cstrong\u003elow battery warning\u003c\/strong\u003e at 10% remaining, and a \u003cstrong\u003ecritical low alert\u003c\/strong\u003e when immediate replacement is needed.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\n      \u003csummary style=\"background:#e6f4f3; padding:12px 16px; font-weight:600; cursor:pointer; list-style:none;\"\u003eHow do I temporarily boost the heating without changing my programme?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:12px 16px; font-size:14px;\"\u003eIn \u003cstrong\u003eAUTO mode\u003c\/strong\u003e, simply press the up\/down temperature buttons to set a higher target. This acts as a \u003cstrong\u003etemporary override\u003c\/strong\u003e, which stays active until the next programmed period begins — at which point the thermostat automatically reverts to the scheduled temperature. Alternatively, use the \u003cstrong\u003e+1 hour override\u003c\/strong\u003e to extend the current period by one hour without any reprogramming.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\n      \u003csummary style=\"background:#e6f4f3; padding:12px 16px; font-weight:600; cursor:pointer; list-style:none;\"\u003eIs the TTHWFP Boiler Plus compliant?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:12px 16px; font-size:14px;\"\u003eYes. The TTHWFP satisfies the \u003cstrong\u003eBoiler Plus on\/off boiler control requirements\u003c\/strong\u003e for England. It provides time and temperature control through its 7-day programmable schedule and on-screen adjustments. Note that for \u003cstrong\u003ecombi boilers\u003c\/strong\u003e, Boiler Plus additionally requires a weather compensator, load compensator, or smart control — the TTHWFP alone covers the time-and-temperature element of compliance.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary style=\"background:#e6f4f3; padding:12px 16px; font-weight:600; cursor:pointer; list-style:none;\"\u003eWhat should I do if the thermostat display is flashing and the relay LED is red?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:12px 16px; font-size:14px;\"\u003eA \u003cstrong\u003eflashing display with a red LED on the relay box\u003c\/strong\u003e indicates a wireless signal loss. Try \u003cstrong\u003emoving the thermostat to a different location\u003c\/strong\u003e to restore communication — walls, metal objects, and other wireless devices can interfere with signal. If the relay LED is flashing slowly, the relay box is in \u003cstrong\u003ebinding mode\u003c\/strong\u003e and will exit automatically after 3 minutes. If the relay LED is off, press the relay button to check it has mains power, then contact your installer if no binding data is stored.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Totalhome by Resideo","offers":[{"title":"Default Title","offer_id":64671904530781,"sku":"TTHWFP","price":59.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/TotalhomeTTHWFPWireless7DayProgrammableRoomThermostat.webp?v=1778597680","url":"https:\/\/qualityheating.co.uk\/products\/totalhome-tthwfp-wireless-7-day-programmable-room-thermostat-replaces-honeywell-cm927-cm921-cm727","provider":"AIZO Quality Heating","version":"1.0","type":"link"}