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Friedrich VHA12K Limit Switch
The limit switch contains a sensor in the air handler that decides when the air is warm enough for the blower to be activated. The reason limit switches exist is due to the fact that if the air inside the furnace is too cool then you will never get hot air through the ducts.
Major signs of an inadequate limit switch
- The HVAC system will not start or will not stay running even though the desired temperature has not been attained
- The Friedrich system begins to run erratically on a regular basis
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If you are going to be buying or purchasing a replacement limit switch for your Friedrich VHA12K do your best and cross-check the correct model and also make a visual inspection in order to be sure the correct limit switch is the one being purchased. It can be quite simple to replace a limit switch on your Friedrich VHA12K as long as you know what you are doing and have all the necessary tools to get it done.
Feel free to download your manual for help.
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