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You are referring to the air handler portion of AC. One of the fan blades is hitting something. Kill the power to all of ac and air handler and open up the air handler by removing the panel facing you exposing the fan. Manually turn the blade and look for the offender. Bend back into place, put back panel and tape up properly and turn all breakers back on.
Ir maybe just moving the fan motor itself slightly will do the trick. Whatever is easier and works will do.
The 5 amp fuse may be bad, they go quite often, and they are exactly the same as the car ones. Check the fuse with a meter. If its OK turn the unit on and check for voltage going to the blower fan. You should get a reading between at least one pair of wires. The unit should have a schematic on it somewhere, check it to see which wire pairs are used for the variable speeds of the fan.
If you mean that your OUTDOOR AIR CONDITIONER FAN MOTOR is blowing AND no air is coming out of the vents within your house, it clearly indicates to me that 1 of 2 things are wrong.
Either (1) your INDOOR AIR HANDLER is NOT running or (2) the INDOOR AIR HANDLER is running but your PLENUM has come apart.
If your INDOOR AIR HANDLER UNIT is NOT running, it could simply be the circuit breaker is OFF/TRIPPED and simply needs to be turned OFF; then turned ON. If that does not FIX your problem, then it is most likely your 5 micro-farad run capacitor for your indoor fan motor needs to be replaced. It will prevent your indoor fan motor from energizing. Worst case scenario would be your INDOOR FAN MOTOR has windings burnt and needs to be replaced. If your indoor air handling unit is equipped with a CONDENSATE VALVE CUT-OFF SWITCH, check to see if your drain pan is filled, thus energizing the switch. If the CONDENSATE VALVE CUT-OFF SWITCH is ENERGIZED, it will prevent the AIR HANDLER FROM energizing. That is the design and the reason for this valve.
Check for fan operation by turning the fan control at the thermostat to "on". If the fan blows, it works. If not, check a circuit breaker or fuse.
If the fan blows when forcing it on with the thermostat but not in automatic, check the fan control circuit in the air handler. Danger: high voltage, beware! There should be a system wiring diagram inside the air handler somewhere.
there will be an access panel where the motor is located. 1st thing to check is fuse or circuit breaker feeding the air handler. this is on seperate power from compressor unit outside and usually has a fused or breakered disconnect on the side of the unit. if fuses are good or breaker is not tripped then switch fan mode to on. if blower runs in on but not in auto then it is a thermostat problem. if still no go then turn off power, remove access panel and find the squirrel cage fan blade. make sure it turns freely. it is very common for these motors to go bad. it can usually be removed easily and taken to a motor shop. I use Roy's Electric in Richmond, Va. They can test the motor on the bench and replace it if it is faulty.
Hi, here is the theory on the reset button on Air Conditioners. They reset via the breaker panel box in your house. Check that first before anything else. However if your unit is popping breakers, it is because the rating for the breaker is incorrect, or there is something that needs servicing usually in the outside unit called the condenser. That piece contains the compressor. A faulty compressor and pop the breaker. Or If the condenser fan that blows over the coils of the outside unit stops (common failure) The compressor will overheat and shut down. That may not trip the breaker but the house will get hot anyway. Usual action for this is to replace the condenser fan motor and starting capacitor. Make sure the speed rating and directional rotation for the replacement motor is the same as the motor removed. There are other reasons why the system won't come one fully. If the wall thermostat is digital and does nothing. including turning on the fan. There will be a small fuse located on the circuit board of the air handler (part of Air Conditioner mounted inside the house. It houses the circulation fan). That fuse could be blown. That one shuts down just about everything. On air handlers mounted up into the attic crawl space there is an overflow pan. This pan is mounted directly below the air handler. This pan can fill with water when the drain pain contained inside the air handler starts to overflow because the drain system to that is clogged. There is a "float switch" mounted in the overflow pan wired to the system in such as way as to shut down the entire AC system if that pan fills. The handling is to clear the obstruction in the Drip Pan inside the air handler. Then remove enough water from the overflow pan and the AC will run as though nothing has happened. If you have more questions, write to me on this site. One thing more. The capacitor alone in the Outside condenser unit can fail and that will stop the condenser completely if it is of a "split" design and used for both the compressor and fan. When replacing this unit alone, ALWAYS find the same specification part. I hope this helps, Have a Happy New Year, Mark
Either you blew the fuse on the air handler control board or you burnt out the air handler transformer.
The thing that blew the fuse is probably the contactor in the condenser unit. You will need to check out out cause of the outage before replacing the fuse or transformer.
Have you hard wired your fan motor to verify that the motor and or the capacitor are good? If you do a continuity test of the motor leads(with electricity off of course) you can see if the motor has open or grounded windings.