AC was working fine. All of a sudden it died. We checked that there is power to the unit. We've ordered a new control box. Do you think replacing this would fix the problem? Also, do you know how hard a task replacing the control box is?
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Re: No Power to unit
Hi, How old is the unit? Is there a warrenty on it. If so, anything you do to it may void the warrenty. First, check to make sure breaker on the end of the plug is not tripped. It will probably have a reset button on it. If it will not reset it can be replaced with a regular 110 plug if needed. (If this is a 110 unit) If you are talking about the control panel on the AC when you say control box I think you are getting into more than you can handle and not sure that what you ordered is even what you need. If you want to get into it, first make sure it is unplugged, Take off the front cover and slide the unit from the outer cover, there may need to be a few screws removed to do this. Look at the wiring and see if there is anything burned or loose. Other than this you would have to get a meter and talk with someone on here familiar with your particular unit to troubleshoot it. I really don't think you should order any parts before you find out what the problem is. If there isn't anything that you can see that's wrong with it I would suggest taking it to Sears and letting then determine if it would be better to fix it or replace it. Hope I have helped.
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It sounds like that unit is connected to a "power saving load
controller" device from the power company. The power company can turn
your unit on & off with a radio signal. If you manually activated
contactor and unit ran. I would bet that the power company's device or
the wiring connecting it is where the problem lies. Call the power
company and have them check their device. If they tell you that the
device has been tested remotely and is working fine. Explain to them
that you can activate your unit manually and it works fine. They should
not charge you to come out. Those "load controller devices" have a
pretty good longevity record.
Hello, if the indoor fan is not kicking on then either the control board is bad, capcitor is bad or the motor itself is bad. One thing you can do is try bypassing the control board by jumping the L1 power wire with the high speed motor wire, if this starts the unit up then the board must be replaced. If not the motor is dead.
All you should have had to do was plug harness from new unit on roof, into control box at ceiling, and re-wire hydro into box as well. Is that what you did? I've seen/done the odd time that Harness from upper unit wasn't plugged in to box just by over-site?
First check the outlet the unit is plugged into. It may be dead, due to a circuit breaker being tripped. Also, the interior of the outlet may be damaged or has a loose wire.
If a circuit breaker was tripped, unplug the unit before resetting the circuit breaker. Then plug the unit back in and turn it ON. If the breaker trips again, there may be a short in the AC wiring or there is another electric appliance on that same circuit, that may be causing an overload, when the AC unit is ON.
Hope this helps you to start troubleshooting the problem. Thanks for choosing FixYa.
If this is a ducted unit, check the thermostat. It has a fuse for protection that may have blown. If the fuse is fine and you have power to the upper units control box, check for 120V incoming power at the control box and also check for incoming 12V on the Yellow and GH wires when tstat is set to high cool.
My Unit is only about 5 years old; but it's working great now. I spoke to a man at an RV service department, he suggest replacing the thermostate and Jay box, which is the box inside my roof unit, accessable when I remove the filter. When I replaced the thermostate nothing changed, but the Jay box did the trick. The Jay Box came with a new thermostate anyway, and cost around $80. Good Luck