| Frequency | 50 Hz; 60 Hz |
| Ambient Temperature | -40 F to +150 F |
| Application | A single circuit board providing combustion air blower control, two speed circulating air blower control, oil primary control, limit circuit inputs, thermostat wiring terminations, & a central appliance wiring point for an oil fixed furnace. |
| UL | Listed: Report MP466 |
| CSA | Certified: File No. LR95329-17 |
| Replaces | ST9103A1002 |
| Heat Fan On Delay | fixed, 45 sec |
| Heat Fan Off Delay | adj. 60, 90, 120, 150 sec (set at 150 sec) |
| Cool Fan On Delay | fixed 0 sec |
| Cool Fan Off Delay | fixed 0 sec |
Description
The ST9103A1002 is a replacement electronic fan timer from Resideo (Honeywell Home).
The fan timer decides when the blower starts after the burner lights and how long it runs after the burner stops. Start too early and the first air out of the registers is cold; stop too early and the heat exchanger keeps its heat instead of the house getting it.
On a furnace that dumps cold air at the start of every cycle, or one where the blower keeps running long after the call, this board is what is doing it.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: ST9103A1002/U
- Type: Electronic fan timer
- UPC: 085267087377
- Category: Fan & Limit Controllers