Hi, I have A0 error code I am trying to clear.
Heater was starting intermittently with multiple restarts.
Blower would come on but it would not ignite. After multiple restarts it would ignite.
Now the blower does not even come on. It just moves from normal "L0" to "A0".
I have had a service call and the service tech indicated that the Combustion Blower is "one" of the problems.
I balked at the $450 part charge for blower plus service fee without much confidence that is the only problem.
I have since found and followed the Troubleshooting guide.
I don't know how to test the pressure switches but tubes are clear and if I blow/suck them I can hear membrane movement.
I pulled the blower and it spins freely. I checked the run capacitor and it was bad so I replaced it but it did not fix it.
I checked the capacitance and although out-of-spec, it does not seem to be "substantially" out of spec although I done know what substantial is. Spec says Black-White should be 30-45 ohms, I measure 44. Spec says Red-White should be 90-130, I measure 74.
I did simple bench test applying 120V to each and motor spins for both, faster for the lower resistance.
So I put it aside and moved to pole test on IC Board. After pulling the power harness from board and jumping the safety switch I stared the flow to initiate call for heat. I measure no voltage across L1 and IND LO which is an indicator of a bad control module.
So that is problem #3 so far.
This is H400IDPL (Propane model of H400IDL) installed in March of 2002 so it definitely not an after 2004 model although it does not have serial number in current format that gives manufacture date.
I can't find the appropriate Integrated Control Board anywhere with search.
Thanks for bearing with this!
So if you got all that, I have a few questions:
(1) is blower substantially out-of-spec and needs replacement? IDLBWR1930 240V
(2) any suggestions on finding Control Module
(3) does anyone know the difference between H400IDL and H400IDL2
any other suggestions?