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Old 12-15-2009, 03:53 AM   #1
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it just stopped working


i have an electric heater and a/c central air system. a couple days ago i had the heater on for a while and it turned off by itself. now it won't come on at all... a/c or heater. no fan, no clicking, nothing. i checked the breakers (all that i could see on the inside unit (which are for the heater coils i think) and outside and they are all still on. any ideas on what might have happened? or do i need to provide more info?

-thanx

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Old 12-15-2009, 04:59 AM   #2
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it just stopped working


Did you check the breakers in your panel box.

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Old 12-15-2009, 05:41 AM   #3
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it just stopped working


yes i checked them.. they are not tripped
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Old 12-15-2009, 06:01 AM   #4
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it just stopped working


May have blown a fuse inside the air handler. On teh control board. Or burnt out the control transformer.
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Old 12-15-2009, 06:23 AM   #5
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it just stopped working


is that a diy thing? how could i find that out?
=thanx for the replies!
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Old 12-15-2009, 08:09 AM   #6
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it just stopped working


Take your meter and check voltage on the incoming side of the breakers in the furnace, leg to leg should be aprox 240 volts. Repeat on outgoing side. Check for 24 volts between R and C. No voltage on incoming is a breaker in the house panel, no voltage on other side is the high voltage breaker in the furnace. If you have high voltage but not 24 volts then there's a blown low voltage fuse, most look like a blade type car fuse. If all that checks out good then set the thermostat so it should be heating and check the W to C terminals in the furnace, should be 24 volts if the thermostat is working.
Beyond that I recomend calling someone. 240 volts fused at 40-60 amps will kill you .
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Old 12-18-2009, 03:52 PM   #7
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it just stopped working


i opened up the panel and there were some wires that apparently got too hot and came loose. i reconnected them and now it works but the fan won't turn off. might that be the fan limit switch?... i opened it back up and looked for like 40 minutes for one and couldn't find it anywhere.
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Old 12-18-2009, 05:09 PM   #8
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it just stopped working


Post brand and model number of air handler, and heater kit.
Could also be a stuck relay.
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Old 02-08-2010, 03:58 PM   #9
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it just stopped working


hay thanx for the replies.. i replaced one of the sequencers and the fan relay and it worked properly... until now. now it seems that a heating element or both is/are staying on while the fan is off. i smell it when fan is off and when fan comes on there is a really strong heater coil smell. any ideas on what it might be? it has 2 coils, 2 sequencers, and 1 relay for the fan.
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Old 02-08-2010, 05:26 PM   #10
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it just stopped working


Other sequencer is sticking/stuck in the closed position.

Or, you miswired.
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Old 02-09-2010, 02:00 AM   #11
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it just stopped working


thanx for replying... i was thinking it might be the other one. i'm sure ii wired the one i replaced just like the previous one. the heating element just started to stay on a couple days ago.. i attached a couple pics of what i have.. i think it's pretty standard. i replaced the bottom sequencer.
Attached Thumbnails
it just stopped working-s6301862.jpg   it just stopped working-s6301865.jpg  
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Old 02-09-2010, 02:20 AM   #12
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it just stopped working


You can use a meter and see if its stuck closed.
It does happen.

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