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Lennox HPXB15-030 Limit Switch
Limit switches are crucial due to the fact that if the air inside the furnace is too cool then the house will never get warm enough. A normal limit switch contains a sensor in the heating area that can determine if and when the air is actually warm enough to activate the main blower.
Major clues limit type switch will not last the year
- The HVAC system refuses to kick in or run for any length of time
- The whole system starts to erratically more often than not
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