/diy/ - Do It Yourself

Anonymous Thu Mar 9 01:04:42 2023 No.2577260 [View]
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>>2575936
I posted a few weeks ago about a failing gas furnace control board. After loading up the parts cannon and replacing the filter caps and replacing the 7805 regulator with a switch mode type, I was finely able to observe the fault. The relays would start clicking on and off at around 1-2 times a second along with the diagnostic and status LED. I got my multi-meter and started probing and found the output of a diode that should have been around 30 volts was 13 volts. I jumpered the failing diode with a 1n4007 from my junk box and the fault disappeared.

failing diode part number is RL104, will a 1N4007 work in it's place?

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/diy/ - Do It Yourself

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