Furnace problems - 3 lights, any solution?
Hi, my Atwood 8535 IV does not want to keep going. It fires up, it blows, the burner comes on but as soon as the electrode stop clicking, the flame stops. It tries 3 times then I get a 3 shot flashing...
Forum Discussion
kuzined wrote:
Ther is a sail-switch in the air stream that tells the board that the blower is working. If it does not close the circuit, the flame will go out.
IF sail switch doesn't close circuit board will NOT get DC power to open gas valve and for ignition
OP.....your problem is main flame is NOT being proven
A signal is generated when main flame lights off...this signal goes back to circuit board 'proving' main flame is lit. Circuit board will not keep DC voltage on gas valve holding it open w/o 'proof' of main flame.
Spark electrode is how signal gets back to circuit board.
As suggested:
Inspect the electrode for cracks in the porcelain.
Inspect the sensor wire for damage.
Make sure the exhaust is clear of any debris, spider nests or wasps.
Also check that spark electrode is engulfed in main flame...positioned directly over burner slots center
And that spark electrode is not dirty/sooted up
Spark gap is 1/8"
Gas pressure will affect where main flame is.
Turn on ALL stove top burners on HIGH...one at a time
Are they the same height
Do they remain at same height as you like off another one
With them all burning........turn water heater on propane. Make sure burner fires/lights off.
What did stove top burners do
If they diminished/flutter/change color......get a new regulator
