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Mitsubishi MS-A09WA-1 Air Pressure Switch
The reason for the existence of the switch is to sense whether the primary blower is actually running. Some particular air pressure switches are equipped with a manual reset feature, which means it will have to be manually reset before the HVAC system will continue. This pressure switch is a very critical piece of the collection of safety devices that is in place to keep you safe from injury or explosions.
Signs to Look for when the Switch has Failed
- The set temperature in the house is almost never fully achieved.
- Furnace will not ignite.
- Incorrect volt reading from the switch.
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If you decide on picking up or purchasing do your best and make sure of the correct model as well as make a visual inspection in order to be sure the right air pressure switch is being ordered. There is no rule that says you have to install it yourself. Hire a pro locally to do the job for you.
Feel free to download your manual for help.
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