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- ItemHigh Limit Switch
- For Use With4LX51-4LX68(A), 4DG26-4DG45, 3E228A-3E237A(B, D), 3E241A-3E247A(B, D), 3E369A-3E378A(B, D), 3E382A-3E388A(B, D), 4DG06-4DG25, 3E389A-3E392A(B), 3E248A-3E251A(B), 4E457-4E462(A), 4E466-4E471(A)
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This high limit switch has three terminals. One terminal is for power to the switch, the second terminal is normally closed for power to run through the safety circuit (normal operation). The third terminal is normally open and will send power to the fan circuit if the limit temperature exceeds it's set temperature (safety). When the limit temperature is exceeded the power is directed to the fan so the unit cools down. When the unit cools down the fan will turn off and the limit will reset and allow the unit to operate normally again. You may want to call HVAC tech support for more details. 800-472-4643
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