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Carrier 50TFQ008 Limit Switch
The main reason limit switches are made is due to the fact that if the air inside the furnace is too cool the you will lose heat in the ducts and the vents will just blow cool air. The limit switch contains a sensor in the heat exchanger that can determine when the heated air is actually warm enough so that it may be pushed through the ducts and out the vents.
Major clues main limit switch should need replacing
- The system begins to erratically occasionally
- The heating and AC system will not start nor will it stay running even though max temp has not been reached
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