Ask Experts Questions for FREE Help !
Ask
    TGS's Avatar
    TGS Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 2, 2013, 07:06 PM
    Carrier furnace with spark but no pilot
    I have a 1988 Carrier furnace model# 394GAZ0361OC. It was having problems on startup where the gas valve opened up and igniter started clicking but it was hit or miss on if it would light the pilot. I took the spark electrode out and cleaned it and along with the gas orifice. This did not solve the problem. I replaced the 3-wire pilot safety switch and the spark igniter but I am still having the same problem. Even with the new safety switch and spark igniter it still has a problem that it had before, and it's the one that many people talk about on message boards. That is, the spark igniter may click away for minutes before lighting the pilot. If I put a match to it when its doing this the pilot will light immediately. I noticed that once it fails to ignite and locks out I can unplug the 6-wire molex conector on the igniter lockout control board and as soon as I plug it back in it immediately sparks and ignites the pilot. Doing this to the igniter lockout control board seems to reset it to a state where it sends enough power to the spark igniter to light the pilot without hesitation but for some unknown reason it fails to do so on one of the next several startups. I looked at the lockout control circuit board and didn't notice any obvious burned up components.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Jan 3, 2013, 07:41 PM
    You may very well have a bad connection on the board at the molex or in the molex itself. Bad solder joints are a common problem.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Intermittent spark ignition spark but will not light pilot on natural gas furnace [ 1 Answers ]

Johnson ultra air 97 natural gas furnace , 18 years old Starting sequence 1) exhaust blower and main blower come on 2) 2 seconds later intermittent spark igniter starts sparking , but will not ignite pilot Will shut down after maybe 20 seconds , do not smell any gas Things I've tried......

Furnace, model no. Gdpi075-3, I am getting spark to pilot and pilot lights ,spark con [ 2 Answers ]

Furnace, model no. gdpi075-3, I am getting spark to the pilot, pilot lights, spark continues, but valve does not open for main burner. This is a dual stage gas valve. There is 24 volts at pin 4 on the gas valve, I also measure 0.76 volts at spark control, this wire comes from flame sensor. With all...

Where is the pilot on the carrier furnace? [ 1 Answers ]

Where do I place the mastch to light the pilot on the carrier furnace?

Warm air furnace: no pilot light, no ignition spark [ 8 Answers ]

I have an International Comfort fan assisted warm air furnace with an issue: The unit does not heat - burners and pilot do not light. The flame blower runs when heat is commanded from the thermostat. There seems to be no gas as the pilot. There is no pilot light, and no spark when...

View more questions Search