Payne PG8MAA Error Code Continuous ON: Normal Operation - No Call for Heat
What Does Code Continuous ON Mean?
A continuously lit LED on the Payne PG8MAA's Integrated Furnace Control (IFC) board means the control has 24VAC power and is operating normally. The furnace is in standby mode, waiting for your thermostat to send a call for heat.
This is the expected status when the furnace is powered on but your thermostat is not requesting heating. The control board is actively monitoring all inputs and is ready to begin a heating cycle as soon as the thermostat closes the R-W circuit (calls for heat).
If you see this status but your furnace is not heating when you expect it to, the issue is likely with the thermostat settings or wiring rather than the furnace itself. Verify your thermostat is set to HEAT mode and the set temperature is above the current room temperature.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Thermostat is not calling for heat (normal standby) | Most common | — |
- The LED is continuously on but the furnace does not respond when the thermostat calls for heat
- The thermostat is set correctly but no heating cycle begins
Sources
✓ Verified against manufacturer service manual — March 2026