Contol board fuse blows?
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Contol board fuse blows?
Hello, I have a Day And Night furnace. The contol board burned up at the wiring harness connection. Initially water had dripped down from the A/C coil directly above. So I replaced board and harness. Now the A/C and Blower work. But, when heat is turned on the blower turns on, but the fuse at the contol board blows, when the ignitor should start?
Last edited by gthang; 09-09-08 at 10:46 AM. Reason: Spelling clearification
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Please help! I have the same problem, except I have a Carrier Furnace. Water dripped down from the A/C, causing the control board and wiring harness to burn up. Replaced those two, A/C works fine, now the control board fuse keeps blowing when we turn on the furnace. I've double-checked the wiring schematic, along with another person who does heating/cooling repair. Everything seems to be in order, also no wires touching the box. Any suggestions?
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Spark but no ignition
I got the control panel to stop shorting out. And the ingitor is working. But now the ignitor sparks but no fuel is getting to the pilot light. I had shut off the valve. Furnace wont light. Any suggestions. Originally, I believe the A/C leaking was the problem, (coils froze solid, leaked when thawed) and when I replaced the wiring harness I crossed the wires to the spark generator. Causing the control board to short.
Last edited by gthang; 09-15-08 at 08:58 AM. Reason: more info
#9
And if there is PV power, you may have to remove pilot assembly and check orifice at the far end as maybe something jarred loose from all the work. First make sure you are certain every gas valve is on before engaging further in any work.
If they were on, then shut one off before removing assembly. Pilot holes are extremely tiny, and you do not want to enlarge them by reaming them out with a drill bit. Just air compressor blow it clean or poke it clean with a real fine strand of wire brush.
If they were on, then shut one off before removing assembly. Pilot holes are extremely tiny, and you do not want to enlarge them by reaming them out with a drill bit. Just air compressor blow it clean or poke it clean with a real fine strand of wire brush.