Totalhome TTHWFP Wireless 7 Day Programmable Room Thermostat - Replaces Honeywell CM927 CM921 CM727
Totalhome TTHWFP Wireless 7 Day Programmable Room Thermostat - Replaces Honeywell CM927 CM921 CM727
The Totalhome TTHWFP is a wireless 7-day programmable room thermostat manufactured by Resideo — the same engineering team behind the trusted Honeywell Home range. It is the direct replacement for the Honeywell CM927, CMS927, CM727, and CM921 and pairs straight to an existing Honeywell BDR91 relay box without rewiring. With four programmable heating periods per day, AUTO/MAN/OFF operating modes, a built-in service reminder, and full Boiler Plus compliance for on/off boiler control, the TTHWFP delivers precise and flexible heating management in a compact, battery-powered unit. Made in the UK and Europe and backed by a 3-year warranty.
The older Honeywell HC60NG and R6660D (rectangular) wireless receivers are not compatible with the TTHWFP and will cause persistent wireless communication faults. These receiver models must be replaced with the supplied wireless relay box included in this pack. The TTHWFP binds directly to existing BDR91 receivers without issue.
The wireless relay box operates at 230 V AC mains voltage. Wiring of the relay box must be carried out by a competent person. Switch off the mains power at the circuit breaker before accessing any wiring.
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
The TTHWFP communicates wirelessly with the supplied relay box, so there is no need to run a wiring cable between the thermostat and the boiler. Place the thermostat wherever best represents the room temperature — on a shelf, wall-mounted, or on the table stand provided.
Set a fully independent heating schedule for every day of the week, with up to four time-and-temperature periods per day (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 Copy Day function to replicate one day's programme across other days quickly.
Switch between AUTO (follows programmed schedule), MAN (holds a manually set temperature until changed), and OFF (heating off). In AUTO mode, a temporary override adjusts the temperature until the next scheduled period; in MAN mode, overrides are permanent until manually changed. A +1 hour override is also available for quick one-off boosts.
An on-screen service reminder alert 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.
The built-in memory retains the full user programme indefinitely, 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.
A confirmed direct replacement for Honeywell CM927, CMS927, CMS927B1049, CM721, CM727, and CM921 room units. Pairs to an existing Honeywell BDR91 relay with no additional configuration — or use the included relay box as a fresh installation. Ideal for upgrading ageing wireless thermostats with minimum disruption.
| Manufacturer Part Number | TTHWFP |
| Thermostat Power Supply | 2 × AA batteries |
| Relay Box Power Supply | 230 V AC |
| Relay Box Contact Rating | SPDT, 5(3) A @ 230 V AC |
| Programming | 7-day, up to 4 periods per day |
| Operating Modes | AUTO / MAN / OFF; +1 hour override |
| Thermostat Dimensions (H × W × D) | 95 mm × 134 mm × 29 mm (without stand) |
| Relay Box Dimensions (H × W × D) | 92 mm × 96 mm × 34 mm |
| Replaces | Honeywell CM927, CMS927, CMS927B1049, CM721, CM727, CM921 |
| Compatible Relay | Honeywell BDR91 (direct bind) |
| Boiler Plus Compliance | Yes — on/off boiler control |
| Country of Manufacture | UK and Europe |
| Warranty | 3 years |
| Manufacturer | Resideo (TotalHome) |
Original: $91.78
-65%$91.78
$32.12More Images
Totalhome TTHWFP Wireless 7 Day Programmable Room Thermostat - Replaces Honeywell CM927 CM921 CM727
The Totalhome TTHWFP is a wireless 7-day programmable room thermostat manufactured by Resideo — the same engineering team behind the trusted Honeywell Home range. It is the direct replacement for the Honeywell CM927, CMS927, CM727, and CM921 and pairs straight to an existing Honeywell BDR91 relay box without rewiring. With four programmable heating periods per day, AUTO/MAN/OFF operating modes, a built-in service reminder, and full Boiler Plus compliance for on/off boiler control, the TTHWFP delivers precise and flexible heating management in a compact, battery-powered unit. Made in the UK and Europe and backed by a 3-year warranty.
The older Honeywell HC60NG and R6660D (rectangular) wireless receivers are not compatible with the TTHWFP and will cause persistent wireless communication faults. These receiver models must be replaced with the supplied wireless relay box included in this pack. The TTHWFP binds directly to existing BDR91 receivers without issue.
The wireless relay box operates at 230 V AC mains voltage. Wiring of the relay box must be carried out by a competent person. Switch off the mains power at the circuit breaker before accessing any wiring.
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
The TTHWFP communicates wirelessly with the supplied relay box, so there is no need to run a wiring cable between the thermostat and the boiler. Place the thermostat wherever best represents the room temperature — on a shelf, wall-mounted, or on the table stand provided.
Set a fully independent heating schedule for every day of the week, with up to four time-and-temperature periods per day (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 Copy Day function to replicate one day's programme across other days quickly.
Switch between AUTO (follows programmed schedule), MAN (holds a manually set temperature until changed), and OFF (heating off). In AUTO mode, a temporary override adjusts the temperature until the next scheduled period; in MAN mode, overrides are permanent until manually changed. A +1 hour override is also available for quick one-off boosts.
An on-screen service reminder alert 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.
The built-in memory retains the full user programme indefinitely, 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.
A confirmed direct replacement for Honeywell CM927, CMS927, CMS927B1049, CM721, CM727, and CM921 room units. Pairs to an existing Honeywell BDR91 relay with no additional configuration — or use the included relay box as a fresh installation. Ideal for upgrading ageing wireless thermostats with minimum disruption.
| Manufacturer Part Number | TTHWFP |
| Thermostat Power Supply | 2 × AA batteries |
| Relay Box Power Supply | 230 V AC |
| Relay Box Contact Rating | SPDT, 5(3) A @ 230 V AC |
| Programming | 7-day, up to 4 periods per day |
| Operating Modes | AUTO / MAN / OFF; +1 hour override |
| Thermostat Dimensions (H × W × D) | 95 mm × 134 mm × 29 mm (without stand) |
| Relay Box Dimensions (H × W × D) | 92 mm × 96 mm × 34 mm |
| Replaces | Honeywell CM927, CMS927, CMS927B1049, CM721, CM727, CM921 |
| Compatible Relay | Honeywell BDR91 (direct bind) |
| Boiler Plus Compliance | Yes — on/off boiler control |
| Country of Manufacture | UK and Europe |
| Warranty | 3 years |
| Manufacturer | Resideo (TotalHome) |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Totalhome TTHWFP is a wireless 7-day programmable room thermostat manufactured by Resideo — the same engineering team behind the trusted Honeywell Home range. It is the direct replacement for the Honeywell CM927, CMS927, CM727, and CM921 and pairs straight to an existing Honeywell BDR91 relay box without rewiring. With four programmable heating periods per day, AUTO/MAN/OFF operating modes, a built-in service reminder, and full Boiler Plus compliance for on/off boiler control, the TTHWFP delivers precise and flexible heating management in a compact, battery-powered unit. Made in the UK and Europe and backed by a 3-year warranty.
The older Honeywell HC60NG and R6660D (rectangular) wireless receivers are not compatible with the TTHWFP and will cause persistent wireless communication faults. These receiver models must be replaced with the supplied wireless relay box included in this pack. The TTHWFP binds directly to existing BDR91 receivers without issue.
The wireless relay box operates at 230 V AC mains voltage. Wiring of the relay box must be carried out by a competent person. Switch off the mains power at the circuit breaker before accessing any wiring.
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
The TTHWFP communicates wirelessly with the supplied relay box, so there is no need to run a wiring cable between the thermostat and the boiler. Place the thermostat wherever best represents the room temperature — on a shelf, wall-mounted, or on the table stand provided.
Set a fully independent heating schedule for every day of the week, with up to four time-and-temperature periods per day (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 Copy Day function to replicate one day's programme across other days quickly.
Switch between AUTO (follows programmed schedule), MAN (holds a manually set temperature until changed), and OFF (heating off). In AUTO mode, a temporary override adjusts the temperature until the next scheduled period; in MAN mode, overrides are permanent until manually changed. A +1 hour override is also available for quick one-off boosts.
An on-screen service reminder alert 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.
The built-in memory retains the full user programme indefinitely, 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.
A confirmed direct replacement for Honeywell CM927, CMS927, CMS927B1049, CM721, CM727, and CM921 room units. Pairs to an existing Honeywell BDR91 relay with no additional configuration — or use the included relay box as a fresh installation. Ideal for upgrading ageing wireless thermostats with minimum disruption.
| Manufacturer Part Number | TTHWFP |
| Thermostat Power Supply | 2 × AA batteries |
| Relay Box Power Supply | 230 V AC |
| Relay Box Contact Rating | SPDT, 5(3) A @ 230 V AC |
| Programming | 7-day, up to 4 periods per day |
| Operating Modes | AUTO / MAN / OFF; +1 hour override |
| Thermostat Dimensions (H × W × D) | 95 mm × 134 mm × 29 mm (without stand) |
| Relay Box Dimensions (H × W × D) | 92 mm × 96 mm × 34 mm |
| Replaces | Honeywell CM927, CMS927, CMS927B1049, CM721, CM727, CM921 |
| Compatible Relay | Honeywell BDR91 (direct bind) |
| Boiler Plus Compliance | Yes — on/off boiler control |
| Country of Manufacture | UK and Europe |
| Warranty | 3 years |
| Manufacturer | Resideo (TotalHome) |
