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International Comfort Products PGMD30G0608 Limit Switch
One big reason why limit switches are designed that way is because if the warmed air is too cool then the house will never get warm enough. The limit switch is a switch located in the furnace that decides when the heated air is warmed to a point for the main blower to kick in and circulate the air.
Simple warnings that your chief limit switch is on its last leg?
- The system is starting to run inconsistently more than once
- The heating and AC system will not begin the ignition sequence or run even though the desired temperature has not been attained
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