Is the thermostat set on fan on? Be sure the thermostat fan switch is all the way in the auto position..If you have a circuit board with a g terminal that is a gas furnace. Turn power off remove and isolate the green wire then turn power on. Let me know if it still runs. If it does not the circuit board is the most reasonable problem
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You will need to use a meter to check this out. This means you will have to check it with power applied. If your not knowledgeable about electricity then you should call a A/C company as this could hurt and even kill you. If you are then first check to see if the condenser fan is wired into the same relay as the compressor is on if so and the compressor is coming on then pull the capacitor and check the MFD with a meter look on the Capacitor to see what the MFD are supposed to be you must be with in 5% + or - if not replace it.now also make sure this unit dose not have a head pressure switch hooked up to the fan if so then make sure that this switch is closing when the pressure gets up to what it is set for.
stuck realy and or stuck contactor follow the wires from the fan back to the source and bang it if it comes lose you know the source . and replace the realy or contactor .. hope this helps let me know . jon
Take the old capacitor with you to a heating and air supply and they can match it up for you. You can also look at the microfarad rating on the capacitor and go get one with the same rating and the some shape also.
purple wire common to capacitor brown fan terminal to capacitor capacitor is a canister that wires plug into it has three legs common fan and herm your last wire may go to contactor or defrost board or fan relay if you look on you drawing it will tell you where these go if its a indoor blower it is breviated idm if outdoor fan it will be odm all wires are color coded and fairly easy to trace you can also cross-out the wires that are hooked up in the unit with the drawing leaving those three but above all make sure the power is off when doing this a capcitor produces more power it turns 120v into 370 volt
Make sure he is taking an amp draw on differnt componantes such as compressor fan moters also check buss bar at breaker panel also check all wiring connections from beaker panel to unit if alum wire is used make sure paste is on ends of wires
Sounds like bearings are out on the compressor. I'm assuming that it's not the fan motor making the noise, cause if it was - and the fan motor is cycling on and off - it (fan moter cycling on/off) will also cause the compressor to cycle on and off.
But, since you say it's the compressor (from which the noise is coming from) I would have to say the compressor's bearings are out and since it's a hermetic (sealed) compressor - your only option is to have a service tech check it out to be sure.
Note: I think you are correct (in thinking) a thermal overload is cutting off the compressor, because the compressor does have a 'saftey overload' built internally in the compressor just for that reason.
Most likely the condensor fan has gone bad. But it can be bad wiring, this fan should run any time the compressor is on. Pull your electricl cut off. (Turn off the electricity) open the control panel look for the area above where the hard pipes come into the mach. look for any burt / loose wiring. If the compressor comes on most os the time the fan motor is bad. When / if you replace the motor do get a new cap to go with it change them together.
The fan only has one capacitor. The other two are for the compressor, one is a start capacitor and the other a run capacitor. A schematic should be on your fan motor telling you witch two wires run to the start capacitor for the fan motor.