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What types of timers does the HONEYWELL T8624 thermostat feature?
The HONEYWELL T8624 thermostat has up to three timers to help the homeowner remember when to change or clean the furnace air filter, whole-house humidifier pad, or ultraviolet air treatment system UV lamp.
What are the different thermostat timer settings available on the HONEYWELL T8624?
The thermostat timer settings vary based on the type of thermostat system you have. Please refer to the table below for details.
| Timer Measurement | Type of Thermostat | |
|---|---|---|
| Manual System Switches (Heat, Off, Cool) | Pushbutton System Keys (Heat, Off, Cool) | |
| Calendar days in any mode. | Furnace air filter and UV lamp timers | UV lamp timer |
| Calendar days in Heat mode only. | Humidifier pad timer | Humidifier pad timer |
| System run time in any mode. | Furnace air filter timer | |
How do I view or reset the timer settings on my HONEYWELL T8624?
When a timer is activated, the HONEYWELL T8624 thermostat will flash “Filter” until the timer is reset. To view or reset the timer, follow these steps:
1. Reset the timer by pressing the i key until the expired timer is displayed.
2. Press the Time ▲ key to reset the timer.
3. Press the Run Program key.
NOTE: You can view the number of days remaining at any time by pressing the i key three or four times. If more than one timer is active, all active timers show sequentially when pressing the i key several times.
What are the installer setup options for the timers on the HONEYWELL T8624?
| Selection | Installer Setup Number | Factory Setting | Other Choices | ||
|---|---|---|---|---|---|
| Display | Description | Display | Description | ||
| Furnace air filter timer (pushbutton System keys) | 43 | 2 | 30 days (System run time) | 0, 1, 3, 4 | 0 – off 1 – 10 days 3 – 60 days 4 – 120 days (Time is counted when heat, cool or fan is running) |
| Furnace air filter timer (manual System switches) | 43 | 2 | 90 days (calendar days) | 0, 1, 3, 4 | 0 – off 1 – 30 days 3 – 180 days 4 – 365 days (Time is counted by calendar days in any mode.) |
| Humidifier pad monitor | 44 | 0 | Off | 1, 2, 3 | 1 – 90 days 2 – 180 days 3 – 365 days (Time is counted by calendar days in heat mode.) |
| Ultraviolet air treatment (UV) system lamp monitor | 45 | 0 | Off | 1 | 1 – 365 days (Time is counted by calendar days in any mode.) |
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