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Hello,My name is ***** ***** I will do my best to assist you. I am looking over your question now and will respond shortly.
first....have you held the reset for a full 30 seconds yet?
the next - hold the button for 60 seconds until the lights flash from yellow to red constantly,do not release until both lights go out, which is another 20 seconds.
does that mean you tried that and it did not work?
do we get flame but it shuts off...or we never get flame?
can you verify that there is definitely flame?
Does the vent pipe get warm/hot before it shuts off?
ok this will get pretty involved and I do not know how far you want to go...
It could be:
No fuel to gun (plugged oil filter)
Out of oil
or the control itself
Try again and if it does not catch in 3 times shut down and call for service.
we do not want to possibly be putting unburned oil in the furnace each time
I understand now...gas or propane?
is the burner set up for natural gas or propane gas?
Ok, this came 2 ways...a peeper eye or a flame sense rod.
Either one only runs 3 seconds if the flame is not there.
Can you tell if there is any sparking for ignition and do you happen to have a inspection port?
yes turn back on and see if the gas valve ever clicks
many conversions had a view port to see into exchanger
all valves open and gas available?
can you pull the gun and use steelwool on the sense rods?
thermostat will not matter..
Basically you unhook the gas pipe..undo the bolts that hold the front flange to the furnace and remove the entire gun
I have to go offline so I will unlock this so the others here can assist.
I wish you luck on the project!