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Carrier 58MSA040 Limit Switch
The limit switch is a switch in the air handler that can determine when the air is actually warm enough for the blower to be activated. One big reason why limit switches are designed that way is due to the fact that if the air never warms up inside the exchanger then you will never get hot air through the ducts.
Some clues limit switch is on its last leg
- The heating and AC system refuses to start nor will it stay running even though max temp has not been reached
- The whole system begins to stop suddenly repeatedly
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Before buying or ordering do your best and cross-check the correct model as well as make a visual inspection in order to be sure the proper replacement limit switch is the one being purchased. Installation of the limit switch is not difficult assuming you possess the knowledge and have the proper tools to get it done.
Feel free to download your manual for help.
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