Outside Unit does not shut off/iced over

Old 09-20-02, 07:23 PM
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Outside Unit does not shut off/iced over

Outside unit does not shut off, unless we cut breaker. The pipe going from house to unit gets iced over if runs for long period of time. Thermostat inside seems to be shutting off and on like it should (??) We are going to try changing the thermostat. Any ideas on what else could be the problem?? HELP!!
Old 09-20-02, 07:32 PM
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With the power to the outdoor unit off and the thermostat turned to off, take a look inside the control box on the outdoor unit. You're looking for a large relay which is called the compressor contactor, See if it's stuck closed either because there are ants in it or the contact points have burned together. You could have a wiring or t-stat problem but the first thing to check is the contactor. If you continue to run the unit with the freezing, you'll soon be buying a new compressor. $$$$
Old 09-20-02, 07:41 PM
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Thanks. Will check it in the a.m. We have been shutting the outside unit off during day and running a few hours at night for past day. No new compressor if we can help it!! Thanks again.
Old 09-21-02, 02:20 AM
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It may be low on freon or the filter blocked
Old 09-21-02, 02:09 PM
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if fan

is cycling per tstat, bigjohn is right, contactor is to blame
Old 09-21-02, 06:36 PM
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Thermostat is turning off and on inside, but the outside unit never shuts off. Is that what you are talking about? (It is cooling fine)
Old 09-22-02, 06:25 AM
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The contactor in the outside unit might be defective. Replace.
Cut and Paste this web link to find more about Contactor part.

good luck!

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