Could resoldering wire for heat mess up the AC?

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Old 11-17-13, 11:12 AM
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Could resoldering wire for heat mess up the AC?

I was having a problem with the heat turning on at the first cold snap. Up to that point I had no problems with the AC. I popped off the front of the (non-digital) thermostat and noticed of the three wires, that the one on the right side of the small plastic dial was not attached any longer. So I resoldered it. Evidently the weight of the solder affects the temp control (?), you tell me, because when the heat runs now, the actual temps don't seem to match the dial. But that's of little concern.

Now the AC doesn't blow cold. The fan comes on.

What could the relationship be? Is there one?

Would replacing the thermostat return the AC to operational?

Thanks for your help!!

Sorry, I don't have the unit/model details with me where I am right now.
 
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Old 11-17-13, 12:59 PM
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Welcome to the forums.

You are talking about an older style mercury bulb thermostat. Resoldering the wiring back to that device will upset the temperature setting. It should be resettable.

With the age of that thermostat it may be time to pickup a new inexpensive one.
 
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Old 11-17-13, 05:15 PM
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Thank you, PJmax. Guess I will replace the thermostat with the hope that replacing it will take care of the AC issue.
 
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