| Operating Temperature | 0 F to 200 F |
| Mounting | Mounts on return duct |
| Application | Mount on return duct for backup control of non-zoned systems |
| Used With | THM5320R1000 Equipment Interface Module; TH6320R1004 or TH5320R1002 Wireless FocusPRO® Thermostat |
| Dimensions | 3 7/8 in. high x 4 1/8 in. wide x 1 1/4 in. deep |
| Color | Gray |
Description
The C7735A1000 is a return duct sensor from Resideo (Honeywell Home), for backup control of non-zoned RedLINK-enabled systems.
It mounts in the return duct and gives the system a temperature to fall back on. If the wireless link to the thermostat drops, the equipment does not simply stop — it holds the house on the duct reading until the thermostat comes back. That is the difference between a lost signal and a no-heat call in January.
Rated 0 °F to 200 °F.
Goes with: TH6320R1004, TH5320R1002.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: C7735A1000/U
- Type: Return duct sensor (backup control)
- Operating temperature: 0 °F to 200 °F
- Mounting: Mounts on return duct
- Used with: THM5320R1000 Equipment Interface Module; TH6320R1004 or TH5320R1002 Wireless FocusPRO® Thermostat
- UPC: 085267213417
- Category: RedLINK Accessories


