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Haier HC42D2VAR Air Pressure Switch
The main function of the pressure switch is to sense whether the blower fan is doing what it is supposed to do. This is just one of the many indispensable mechanisms designed to keep you safe. Most air pressure switches are issued with a manual reset feature, which makes you reset it by hand or the entire system will not run.
Symptoms that the System Pressure Switch has Failed
- The expected indoor temperature seldom achieved.
- The furnace can not ignite.
- Inaccurate volt reading.
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Before buying or ordering do your best and double check the model number as well as make a visual comparison in order to be sure the right air pressure switch is the one being purchased. Once you have the part to install it yourself. Hire a pro locally to pay to install it for you.
Feel free to download your manual for help.
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