I have a 25yr old downdraft Payne. The burner comes on but the fan does not start until the burn shuts off. It does come on though and then shuts off. I turned the fan to always on this solved the heating problem but the fan must run 24/7 to keep heating the house. Issue? Control board? Furnace heat switch that turns on fan?
Payne downdraft fan slow to come on
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Control board not bringing on the fan maybe? got a multi-meter?
post a model number.
post a model number.
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get us a picture of unit with door off...could be bad relay on control board, could be... bad fan and limit switch..
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If this furnace is controlled by electronics, i'm thinking the circuit that brings the fan on in heat mode is faulty and the fan coming on is just normal behavior when the limit trips.
The fan does come on the moment the burner turns off. Burner on maybe 30 seconds then off with fan on for maybe 30 seconds then off. Cycle repeats after a minute or so. Model Payne downdraft
396JAW048065 ABFA
Burner assembly and fan assembly
396JAW048065 ABFA
Burner assembly and fan assembly
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got a multi-meter?
30 seconds isn't enough to trip the limit, in fact it's the normal time delay.
this is carrier's older design; goofy spark ignition system with a bi-metal heat activated flame sensor. wouldn't be surprised if the system was sensing a flame-drop out, cutting out and restarting the ignition sequence. can't help you there.
inspect the heat exchanger before throwing parts at it.
30 seconds isn't enough to trip the limit, in fact it's the normal time delay.
this is carrier's older design; goofy spark ignition system with a bi-metal heat activated flame sensor. wouldn't be surprised if the system was sensing a flame-drop out, cutting out and restarting the ignition sequence. can't help you there.
inspect the heat exchanger before throwing parts at it.
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