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Good Morning. I am Kevin, one of the Tech's here on JA.
If your available to troubleshoot I think we can try to solve your problem.
when you say "blower motor" you are describing the small motor in the burner compartment, to remove the flue gas from the home?
If your big "blower or circulating fan" does not run, then we need to address this problem, this would cause the "high limit" to open (do it's primary function) and not allow the furnace to over heat.
If your inducer motor does not run, then we need to go in that direction.
do you have a "fan on" switch on the thermostat?
I'm talking only your blower motor now, the motor that circulates the heat or air conditioning into the room. If that motor does not operate properly, it will shut off the furnace. We need to determine if only this motor operates properly first.
try connecting the R and G contact. Tell me what happens?
I may be here in a couple of hours, I would rather chat with you and give you the directions other then waste each others time.
I'm all about safety first.......
my username is ***** ***** I should be here. I have paperwork to do all day today, unless I have to go out on emergency call. Our entire conversation is always saved, so that if I am not here, there are others that can help, and see what we have tried so far. So you can always feel confident that we are addressing your question with a good "game plan"..... only because it's "football day" right?
ok, I'm here, let's see if we can figure it out
ok so your saying the vent motor does not come on?
do you have a volt/ohm meter?
we need to test the voltage (120V) going to the draft inducer motor. reset the system, turning off then on, allow to go through maybe a 3 minute cycle and see if you get a 120V.........
if at any point you receive a 120V potential, wires are still connected to motor, then you have bad motor, you must start here for diagnosis.
if you can get the probes firmly seated into the connections to the draft motor that should be good. if it does not work the first time, I would tes by disconnecting the motor and placing the probes into the motor leads and retesting.
ok, now move on to the next step............
ok, we have a call for heat, we have the thermostat calling for heat? inducer motor is running, I did not ask, but is this a rental or owner occupied unit?
is the gas turned on...... I know this maybe a stupid question but you need to start at the beginning?.
lp or natural gas?
ok, gas is on, thermostat is calling for "heat". then the furnace should be operating. what is happening on the furnace? on a call for heat?
the problem is we need to know why the system did not heat. The system may produce a error code, but may have been cleared by so many consecutive successful cycles. You may need to let the system go to produce the error again. At the point of the error, we maybe able to diagnose the failed component if any. It may have been just a fluke. Either way, the heat is running and that is the goal. If the problem returns, please feel free to contact me directly.
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