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LImit Switch on AC/Heater Unit for Home

We bought our house about a year ago, and joined the smart AC program with PGE. Our Heater worked fine until after a new thermostat (their smart AC one) was installed. Whether or not, it is linked, I don't know. But now our limit switch on our AC/Heater Unit locks and cold air is blown through our house in the winter time. The only way to stop this from happening until the limit switch can be reset by climbing on the roof to the unit, is to shut off the breaker to it.

My questions is, how hard would this be to fix on our own, and if it would be impossible, how much would a technician run to fix it for us. We know we cannot afford a new heater/AC unit at this time.

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  • Danny Clark
    Danny Clark May 11, 2010

    have you checked your filters to see if they're dirty/clogged?

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Get a diagnostic fee only, then determine if you can fix it yourself or not. Generaly you should only pay around 65. Depends on your service tech, call around. meBNme is on to something check your filters, if the unit is suffering from any air restrictions, it could be going off on high pressure. You could also be overcharged and or overcharged (from a leak).

Posted on Dec 06, 2008

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Need more information.... Is this a whole house unit, a window unit or what? Model #?

The breaker would be in your basement or wherever your breaker box is. If it's a 220 unit, one side could be kicked if whoever hooked it up used 2 seperate breakers (very unusual but it's been done).

Good luck!

Geno

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