Howdy folks, this is my firs post, so thanks in advance for any advice!
Here's the issue:
My furnace really struggles to get the house up to temp, with relatively mild outdoor temps (freezing or so). Here are the steps it goes through:
My guess is that something is telling the control board to shut the inducer motor off, and as soon as it goes off, the vacuum switch tells the valve to shut the gas off.
Any ideas what sensor inputs might tell the control board to shut inducer motor off? Am i barking up the wrong tree?
Lennox G26Q3-75-2
Honeywell continuos retry ignition moduel
ICM289 control board
Here's the issue:
My furnace really struggles to get the house up to temp, with relatively mild outdoor temps (freezing or so). Here are the steps it goes through:
- Turn up the thermostat, it calls for heat.
- Inducer motor comes on like it should
- Igniter starts
- Burner starts
- Blower motor comes on.
- Furnace runs fine for 8-12 minutes, then burner and inducer motor shut off. Blower stays on.
- After a few minutes, Inducer motor attempts to start – it cycles 3 or 4 times, then stays on.
- Burner comes on, like normal,
- Repeat.
My guess is that something is telling the control board to shut the inducer motor off, and as soon as it goes off, the vacuum switch tells the valve to shut the gas off.
Any ideas what sensor inputs might tell the control board to shut inducer motor off? Am i barking up the wrong tree?
Lennox G26Q3-75-2
Honeywell continuos retry ignition moduel
ICM289 control board