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Found a busted cap on a 15 year old furnace board at a rental in Oak Park last Tuesday
I replaced it with a 10 cent cap from my van stash and the whole system fired right back up, has anyone else found a single bad component that fixed a no-heat call without replacing the whole board?
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gavin6923mo ago
A cracked resistor right down the middle and a burn mark on the board underneath it... now that is something you don't see every day. I've changed plenty of caps and relays but a resistor with a physical crack like that, that's a new one on me. Wonder what caused it, maybe a power surge or just old age. And yeah @grace_gonzalez46 I saw that carrier post too, it's crazy how the cheapest parts on these old boards cause the biggest headaches.
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grace_gonzalez463mo ago
Did you read that post about the guy who fixed a 20 year old carrier with a single capacitor?
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johnson.paul3mo ago
Had a similar one a few years back on an old Rheem at a duplex in Evanston. That board had this tiny little resistor that looked like it had gotten too hot and cracked right down the middle (you could see a brown burn mark on the board underneath it). I keep a bag of mixed resistors in my glovebox for exactly this kind of thing, swapped it out and the blower kicked on like it was brand new. Feels like those old boards are built tough but they die from one cheap component failing, you know? I always try to fix the board first unless it's a fire hazard or the board is completely fried. Saves the landlord a couple hundred bucks which they never seem to appreciate, but hey, that's the job.
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