Recently our AC stopped working. The thermostat is working properly, but the unit just started blowing hot air. I've never worked on a AC before, but I was trying to save some money. Anyway:
I started with replacing the capacitor on the unit, after completing that I turned the power back on but still nothing. I pushed the plastic piece in on the contactor and the unit came on, to include the fan. Once I released it the system shut off again. I went inside and checked the breaker box and noticed that two fuses had blown, replaced them and went back outside to see if the unit was running and it was for about a minute then it stopped. Fuses had blown again.
I asked a guy at the AC parts place and he said it could be the fan motor, but he also said it may be the contactor. I replaced the capacitor, fan motor and contactor. The new fan motor had 4 wires and the old had three. Brown, brown/white, black and yellow wires. Instead of using a dual capacitor for the brown and brown/white wires I just capped the brown/white, attached the brown to the F on the three prong capacitor I installed earlier and connect the yellow to the C and the black the line 1 on the contactor.
I made sure everything was secured and all plugged in. Everything looked good and I replaced the fuses in the interior breaker box. Turned the main power on outside, but nothing, fuses did not blow on the inside and thermostat was still working inside. I can't figure it out. Any ideas?