Carrier 55scx ignition problem - http://www.hvacmechanic.com/ Forums
Original message
| jimped
 |  "Carrier 58scx ignition problem"
, posted Wed 12 Dec 21:50:  
A few times a day the furnace fails to ignite. When this happens, the blower comes on, ignitor glows a few times, then shuts down. Once I turn the power off and on, it goes through the same cycle. When it's not igniting, I read 30-32 VAC across t1 and t2 on the gas vale. Since this is supposed to be 24v, is a circuit board problem causing this voltage to be too high? Will 5-6 volts over cause the valve to not open? It does click.
Anybody know for sure if I should replace the circuit board or the gas valve? Thanks.
Jim
[this message was edited by jimped on Wed 12 Dec 21:52] |
| Replies:
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| learner
| "Re(1):Carrier 58scx ignition problem" , posted Thu 13 Dec 01:41
Hi,
Can you tell the voltage reading when furnace is operating normal?
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| | jimped
| "Re(2):Carrier 58scx ignition problem" , posted Thu 13 Dec 09:25
Usually around 27-28. Seems like it's the same as at startup, then maybe tapers off a few volts. Now this morning, the furnace shut down after running for 5 minutes or so. When I cycled the power, it came on and stayed on until the thermostat told it to shut off.
I'm thinking I'll just try a new circuit board, seem like a good move to the experts?
Thanks.
Jim
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| smythers1968
| "Re(1):Carrier 58scx ignition problem" , posted Wed 12 Dec 21:53:
When it is doing this do you get a flash code?
My thoughts is that you are having a problem with the pressure switch closing
Life lesson #12 Know when not to do it yourself.
WOW That Can Hurt!!
[this message was edited by smythers1968 on Wed 12 Dec 21:56] |
| | jimped
| "Re(2):Carrier 58scx ignition problem" , posted Wed 12 Dec 22:42
Thanks, but no flash code, there are no status leds on this thing. ces0110057-01 circuit board.
Jim
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| | static
| "Re(3):Carrier 58scx ignition problem" , posted Thu 13 Dec 19:44
I'd be more inclined to think of a problem with the gas valve then with the circuit board personally.
It's unusual but not unheard of to have more than 30 volts in the control circuit.
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