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Lennox 42W43 Air Pressure Switch
The primary function of the air pressure switch is to see if the blower fan is on and running. This pressure switch is a vital device of all the safety features in today's HVAC systems that is in place to keep you safe from potential hazards in the house. A lot of switches may have a manual reset, which, of course, means that it would have to be reset by hand or the entire system will not run.
Warning Signs that the Air Pressure Switch has Failed
- Your furnace won't ignite the gas.
- Bad electrical voltage being read from the pressure switch.
- The correct temperature in the house is almost never fully attained.
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If you decide on picking up or purchasing do your best and cross-check the correct model as well as make a visual comparison in order to be sure the correct replacement air pressure switch is the one being purchased. HVAC pros can be expensive so you may want to keep a lookout locally to acquire the best rate if you want to pay bottom dollar.
Feel free to download your manual for help.
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