1900 Railroad Ave
Mt Vernon, WA , WA 98273
360-219-9468

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Davis C.

Davis C.


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Arrived onsite to customers home to replace a failed high limit switch, furnace has a lack of return air, this is causing the internal temperatures in the furnace to be too high, after 2 years of the old high limit switch being in high temperatures it caused it to fail. Replaced high limit switch, unit was cycling off immediately due to high limit switch tripping anymore, however the supply air temperature is 129 degrees, with a return air temperature of 68, this is a big temperature split which means the return air is not enough. The unit may trip on high limit because it is not pulling in enough return air to keep the internal temperatures down on the furnace. Recommend adding more return air to the furnace. If adding more return air to the furnace is not done, the high limit switch could go bad again down the road. Thank you for choosing CPI Plumbing and Heating Inc.