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Old 04-22-2012, 12:18 AM   #1
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Central A/C not working after power outage


Hi,

The power was out neighborhood wide for a couple of hours today in a house I rent. The air conditioning was working fine before the power went out (though by chance it was off as I was just about to leave the house) but now that the power is restored it's not working. I've tried to contact the landlord but can't get a hold of him.

The model number is RHEEM RPKA 036-JAZ. Unfortunately I know next to nothing about air conditioning. I verified that none of the circuits had tripped and also found and pushed a red reset button one the outside of the unit but to no effect. I should add that when I pushed the reset button I didn't hear any sort of a click or anything, so maybe I just wasn't pressing hard enough? I thought about trying with a screw driver or a pen but am paranoid about breaking something as it's not my unit. Does anyone know how much pressure this button take? I'd really like to get this sorted out since it's going to be 104 tomorrow. (the house is located near Yuma, AZ) It doesn't seem like it should be so hard since it was working fine before the power outage.

Does anyone have any thoughts? Thanks in advance.

-rs1971

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Old 04-22-2012, 12:36 AM   #2
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Central A/C not working after power outage


you should be able to reset it with a push from finger, did you check fuses ?

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Old 04-22-2012, 12:43 AM   #3
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Central A/C not working after power outage


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you should be able to reset it with a push from finger, did you check fuses ?
Which fuses? Are there fuses inside the unit?

-rs1971
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Old 04-22-2012, 12:45 AM   #4
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Central A/C not working after power outage


should be a fused disconnect box next to unit.
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Old 04-22-2012, 12:52 AM   #5
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Central A/C not working after power outage


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Originally Posted by ggold View Post
should be a fused disconnect box next to unit.
There is a box next to the unit (attached to the exterior wall of the house). When I open it there is something which may or may not be a fuse. It's essentially a black rectangular piece with a little notch in the side which displays the word 'on' underneath. It looks like it should slide and I tried sliding it and got it just far enough to see the word 'off' on the opposite side but no further. Again, I didn't apply to much pressure for fear of breaking something. Does this sound like the fuse box?

-rs1971
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Old 04-22-2012, 01:10 AM   #6
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Central A/C not working after power outage


yes, remove that piece with the on/off tag, there should be one screw holding a black cover, behind that should be two 35 amp fuses..
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Old 04-22-2012, 01:16 AM   #7
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Central A/C not working after power outage


do you get a least supply fan from the stat in FAN ON position that shows you have 24Vs down in the furnace/air handler.if the fan doesn't run might have a glass auto fuse on the control board within or a mini circuit breaker on the transformer mounted in the furnace
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Old 04-22-2012, 01:19 AM   #8
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Central A/C not working after power outage


yes, biggles is correct. do you have a electrical meter (tester) ?
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Old 04-22-2012, 01:41 AM   #9
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Central A/C not working after power outage


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yes, remove that piece with the on/off tag, there should be one screw holding a black cover, behind that should be two 35 amp fuses..
When I remove that I actually don't see any screw. There is what looks like a tab which may be removable unfortunately, I don't even have a screw driver and am working with a little penlight. This isn't my primary residence and unfortunately all of my tools (including my multimeter) are 200 miles away. I guess that I'll just have to sweat the night out and try to get a hold of the landlord again in the morning.

Thanks a lot guys for taking the time to try to help.

-rs1971
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Old 04-22-2012, 02:01 AM   #10
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Central A/C not working after power outage


could easily be a nonfusible 'pullout' disconnect aswell,
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Old 04-22-2012, 02:09 AM   #11
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Central A/C not working after power outage


Flip all breakers off and then on.
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Old 04-22-2012, 02:16 AM   #12
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Central A/C not working after power outage


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could easily be a nonfusible 'pullout' disconnect aswell,
Yeah, that's what it was I think. The piece that pulled out had four metal prongs positioned asymmetrically so that if you flipped it 180 degrees the prongs inserted into a different set of receptacles, obviously killing the power (and exposing the word 'off' in the little slot).

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Old 04-22-2012, 02:22 AM   #13
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Central A/C not working after power outage


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Originally Posted by biggles View Post
do you get a least supply fan from the stat in FAN ON position that shows you have 24Vs down in the furnace/air handler.if the fan doesn't run might have a glass auto fuse on the control board within or a mini circuit breaker on the transformer mounted in the furnace
When I flip the fan from 'auto' to 'on' I don't hear anything, so I guess that there is no power to the fan. I'll try to look for those in the morning but one thing that strikes me as strange is that the unit was turned off both at the moment the power went out and also when it was restores. Given that, wouldn't it be strange that a circuit breaker would have tripped / fuse blown?

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Old 04-22-2012, 02:37 AM   #14
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Central A/C not working after power outage


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Flip all breakers off and then on.
It was worth a try but no dice. If nothing else, at least I'm getting good at resetting all of the digital clocks in the house.

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Old 04-22-2012, 07:01 AM   #15
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Central A/C not working after power outage


The breaker is tripped even though it appears to not be. I bet you didn't reset them, did you?. Flip both a/c and furnace breakers off and then back on.

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