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Trane PTHD120 Limit Switch
A normal limit switch is a type of sensor switch in the heat exchanger that senses, or governs, when the heated air is actually warm enough that it can be circulated throughout the house. Limit switches were created because if the air is not warm enough the you will lose heat in the ducts and the vents will just blow cool air.
Major indications critical limit switch is on its last leg
- The HVAC system starts to act differently from time to time
- The HVAC system will not initiate or run longer than a minute
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Before buying or ordering a new Trane PTHD120 replacement part do your best and make sure of the model number as well as make a visual comparison in order to be sure the right limit switch is the one being purchased. You do not have to replace the part all by yourself. Hire someone with experience in your town or city to do it for you.
Feel free to download your manual for help.
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