My AC stopped working a few months back, got the HVAC guy to come out and he said that the fan motor had gone out on one of the units (we have two) so he replaced it but ever since he did that , the AC will trip at the circuit almost everyday, sometimes a few times a day. When I looked at the old fan motor vs the new one, it looks as if the new one is higher HP 1/4 vs 1/6 and also more AMPs 1.8 vs the old at 1.0. or my other guess is that the shut of switch next to the ac units , one of them looks a little melted and the metal plate is slightly turned due to it. ( not sure if that is the correct name for it but it has a plastic handle that you can pull to shut of the AC unit right there). Any help would be appreciated. Thanks
The motor size increase in itself should not be an issue. .8 amps is minimal on a circuit rated at 30 amps(thats a guess depending on what your actual circuit load is). The disconnect switch on your wall may very well be the culprit. Weak connections can cause over amperage conditions to occur very easily. A bad contactor(the part that energizes and pulls in to turn on the compressor) will cause over amperage and/or voltage imbalance as well if the contacts are severely pitted and/or burned. I suggest powering off the unit at the breaker. Go through all the electrical connections and check for tightness at the lugs. Look for any wiring with broken insulation that could be touching metal intermittently. Take a closer look at the disconnect and look for wiring with melted insulation or fuse holders that are loose or look overheated. (a disconnect can be found at Home Depot). Good luck.
make sure he installed a new fan capacitor when he installed the new fan motor. The tech sounds like a hack if he replaced the motor with a different amps.
