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Matthew AustinAug 9, 2025
How to troubleshoot an Emerson Liebert Challenger 3000 Air Conditioner blower that will not start?
- BBradley HaleAug 9, 2025
If the blower on your Emerson Air Conditioner won't start, there are several potential causes: * **No main power:** Verify that L1, L2, and L3 have the rated voltage. * **Blown fuse or tripped circuit breaker:** Inspect the fuses or circuit breakers connected to the main fan and replace/reset if necessary. * **Overloads tripped:** Push the reset button on the main fan overload. Also, check the amp draw. * **No output voltage from transformer:** Check for 24 VAC between P24-2 and P24-1. If there is no voltage, check the primary voltage. * **Control fuse blown or circuit breaker tripped:** Check for 24 VAC between P4-4 and E1. If there is no voltage, check for a short. Replace the fuse or reset the circuit breaker.
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