Power surge: now a/c won't come on

Jones12

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8:51p, 8/12/18

AG

Had a power surge earlier in the neighborhood. Everything came back on but the A/C. It didn't flip the breaker, but I assumed the switch at the unit would have flipped off. Everything is on, and my Nest keeps saying no power to the Rh line. Any advice how to get it back on or switches I'm not seeing to reset?

Bobcat-Ag

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8:59p, 8/12/18

Is there a switch next to the unit in the attic?

Also, post on the home improvement board if you haven't already.

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91_Aggie

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9:36p, 8/12/18

AG

There might be a breaker at the unit (just in case you only looked in the breaker box do everything else in the house

Jones12

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9:53p, 8/12/18

AG

Yeah I tried hitting the switch in the attic and the one on the outside unit. Couldn't find a breaker in the attic

flakrat

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10:41p, 8/12/18

AG

Check for a fuse at the air handler (usually the same type of fuse as used in cars).

I found out about this when I accidently cut the thermostat wire in half. After splicing it back together I had the same alert on my nest.

You'll likely have to take a panel off to find the fuse.

JTA1029

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11:27p, 8/12/18

AG

Probably the capacitor on the unit. Turn off power and open the side of the AC. Check for a bulged capacitor. Buy a replacement on Amazon for like $30. Having an AC guy out to do this will cost you like $200+.

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FatZilla

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In reply to flakrat • 1:53a, 8/13/18

AG

flakrat said:
Check for a fuse at the air handler (usually the same type of fuse as used in cars).

I found out about this when I accidently cut the thermostat wire in half. After splicing it back together I had the same alert on my nest.

You'll likely have to take a panel off to find the fuse.

Had same as this on mine when i touched wires together installing my nest. The unit had an internal fuse that blew. Had to take the exterior panel off just to see it, never knew it was there till ac guy showed me it.

Jones12

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8:11a, 8/13/18

AG

And just got a new fuse from Lowe's or something?

FatZilla

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In reply to Jones12 • 9:23a, 8/13/18

AG

Jones12 said:
And just got a new fuse from Lowe's or something?

Mine was a popup fuse so i just pushed it in and everything worked afterwards.

flakrat

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In reply to Jones12 • 11:07p, 8/13/18

AG

Jones12 said:
And just got a new fuse from Lowe's or something?

Mine was a 3 amp automobile fuse (purple). I found some at Autozone but they wanted $10 for only a few, so instead I ordered a full kit of fuses from Amazon for $10:

http://a.co/eNjhDPW

I had several car fuses on hand, just not a 3 amp.

flakrat

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In reply to Jones12 • 11:07p, 8/13/18

AG

Jones12 said:
And just got a new fuse from Lowe's or something?

Did you check the fuse on the air handler? Curios of that was it.

Jones12

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11:23p, 8/15/18

AG

Fuse wasn't bad, but when I took it out and put it back in it magically kicked on. Guess it just needed to reset or something?

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flakrat

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In reply to Jones12 • 11:36p, 8/15/18

AG

Good news, maybe the contacts had some corrosion and removing / reinserting removed it.

flakrat

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In reply to flakrat • 11:38p, 8/15/18

AG

I now keep a couple extra fuses at the air handler just in case

JSKolache

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3:49p, 8/16/18

AG

Common issue with power surges - our goes off every time. Fan blows, but a/c does not cool.

I shut it off at thermostat for a few mins and then turn back on. Works every time. Called home warranty tech out once to take a look and he found nothing wrong.

flakrat

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In reply to JSKolache • 3:06p, 8/17/18

AG

JSKolache said:
Common issue with power surges - our goes off every time. Fan blows, but a/c does not cool.

I shut it off at thermostat for a few mins and then turn back on. Works every time. Called home warranty tech out once to take a look and he found nothing wrong.

That's been my experience with everything I've tried to service with a home warranty