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Air Conditioner Troubleshooting

York air conditioner not cooling 
The air filter may be clogged so airflow through the air con is hindered. 
It may be having dirty condenser coils- debris impedes overall cooling performance. 
The unit has a faulty compressor. 
The run capacitor is having issues or it’s blown making the compressor not to run. 
You have an improper thermostat setting or it might be defective (the entire component). 
Your AC may have insufficient refrigerant. 
The unit has a problematic board (culprits could be its main control board, temperature control board, etc.). 

York blower motor problems 
Check if it’s receiving power– test whether current is reaching the motor as lack of power will mean it never runs. Troubleshoot the power supply system if so or proceed to step 2. 
Check if it’s burned out– If it has power but still won’t work, it’s probably burnt. The only solution is replacement. 
Check if the blower fan is experiencing difficulties spinning– your blower motor may not work as desired if the blower fan is obstructed by something. It will make a humming sound in this case and you must remove whatever is blocking the fan’s spinning path to eliminate the problem. 

York air conditioner fan not working 
Test if the fan motor has power. If yes, move to the remaining steps… 
Check if you’re having a bad capacitor (the capacitor supplies power to the fan motor and it could have malfunctioned). 
Check for loose or even a broken belt and repair, if necessary. 
Check if the motor is itself burnt out and replace. 
 
York air conditioner not turning on 
Check if the power cord is in good condition and supplying power (replace if not). 
Check if the circuit breaker has tripped and reset it. 
Wash the air filter (again!) if dirty. 
Work on the thermostat- check the settings (and change) or potential defects (and replace). 
Clean the AC drain pan if dirty. 
Check if the fuse in your York air conditioner has blown and replace. 
 
York rooftop unit troubleshooting 
Clean or change the filters– No matter your model, always start by installing a new filter (disposable types) or cleaning the filter (permanent types). 
Clean condenser coils surfaces– after filters, dirt should be cleared off the condenser coil to restore required operation. 
Check the thermostat- a bad thermostat setting could be causing your cooling woes and you should make sure that it’s properly set. 

York central air conditioner troubleshooting 
Faulty contactor- this part sends voltage to your condensing unit and its failure could affect cooling. Test it for continuity with a multimeter and replace if necessary. 
Bad dual run capacitor– the fan motor won’t operate properly or will completely refuse to work if this has issues. Replace if you notice it’s leaking or bulging. 
Defective condenser fan motor– the capacitor may have failed or the motor itself. Replace the affected component. 
Failed compressor- this should only be checked if all else fails because it’s often misdiagnosed. Test it for continuity and replace if none.

Furnace Troubleshooting

York Furnace not heating 
The igniter gets very hot and glows bright orange to light the gas burner. If the igniter fails or cracks, the furnace won’t heat. To determine if the igniter is faulty, remove the igniter and inspect it for cracks. If the igniter is cracked, replace it. If the igniter is not cracked, use a multimeter to test the igniter for continuity. If the igniter does not have continuity, replace it. 

York Furnace is noisy or loud 
The blower wheel blows air out of the furnace and through the house. The blower wheel is attached to the blower motor shaft with a set screw. If the set screw is loose, the blower wheel will wobble on the motor shaft, and the wheel will be noisy as it turns. Check the set screw to ensure that it is properly tightened. Next, inspect the wheel for damage. If the blower wheel is damaged, replace it. 

York Furnace starts then stops 
The flame sensor monitors the burner to detect whether or not a flame is present. If the flame sensor is defective, it might fail to detect a flame. If the flame sensor does not detect a flame, the control board will shut off voltage to the gas valve to prevent the furnace from heating. Sometimes, if the flame sensor is dirty, it will fail to detect a flame. Try cleaning the flame sensor with a fine abrasive pad. If the furnace still doesn’t heat, replace the flame sensor. 

York Furnace blower not running 
The blower motor blows air through the return vent, past the heat exchanger, and into the home’s venting. First, make sure that power is getting to the motor. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. If the blower motor is burned out, replace it. If the blower motor hums, check the blower fan to ensure that it spins freely. If the blower fan is unobstructed but does not spin freely, replace the blower motor. 

York Furnace blower runs all the time 
The control board has relays that regulate the voltage to each component in the furnace. If the relay that controls the blower motor fails while it is closed, it will send continuous voltage to the blower motor, causing the motor to run continuously. If the control board is at fault, replace it.

Heat Pump Troubleshooting

Heat Pump is Not Cooling 
Thermostat problem - You have to check to see that the thermostat is set to cool mode. If the thermostat is set to cool correctly, then there may be a problem with the thermostat not reading the temperature correctly or an electrical problem stops the element from communicating the system. If you are unable to identify the cause or fix it, call a professional. 

Broken reversing valve - If your unit is running, but hot is coming from vents, there could be a problem with your reversing valve. Reversing valve reverses the refrigerant and allows it to act as both a heater and an air conditioner. If this valve is defective, it needs to be replaced. You can take the help of a technician for replacing this valve. 

Components are dirty - If the air coming out of your vents is lukewarm, that is a sign that your components are dirty. Go outside and clean off the heat pump so it's free of any debris and check the air filter to see if it needs to be changed. 

Refrigerant charge is low - Again you need to inspect the refrigerant levels. If they are too low or if there is any leak, your system will unable to cool your house. Fix leaks if there are any existed and increase the levels.

Thermostat problems 
First of all, you should check that your thermostat has set at the right modes. If every setting is correct, the problem could be a miscalibration. Due to this miscalibration, your thermostat read the temperatures incorrectly, Although, there may be an electrical problem that stops the thermostat from communicating with the heat pump. In these cases, you need to contact a professional for servicing. 

Power Issues 
Sometimes, a tripped circuit breaker is caused for this problem. Make sure all the breakers are in the proper positions. If the circuit breaker is tripped, you have to reset it to avoid electrical issues. Also, check for other electrical issues. If you have a minimum knowledge of electrical components repairing, then you can fix the problem immediately. If not, contact an electrician or a professional. 

Defective starter capacitor 
Once listen to your heat pump unit. If you hear a faint clicking noise, then consider that your system is supposed to be turning on and the problem is likely with the starter capacitor. A starter capacitor is used to transmit the electrical charge that turns on the motors. So, you have to check for the starter capacitor is broken. If so, you need to replace it. 

Broken reversing valve 
As the name indicates, the reverse valve allows the unit to work as both an air conditioner as well as a heater by reversing the refrigerant direction. If you start the heat pump when you need cool air, but it produces heat, then it is likely caused by this valve. If it is damaged.

Heat Pump Running Constantly 
York heat pumps are designed to operate much more gradually than a furnace. If the weather is cold, then there may be a possibility of your system can run near constantly without being an issue. 

Check the thermostat. Make sure it is set correctly. If there is miscalibration with your thermostat or wiring issue, you can get this type of problem. 

See if the compressor contractor is broken. The compressor contactor will able to control how much power goes to the heat pump system. So, your unit runs constantly all the time when the compressor contractor is broken. You need to be done the replacement process to fix this issue. 

System is blocked 
The heat pump pulls the heat from the air outside to your house. When the airflow is blocked by ice, snow, leaves, or any other type of debris. it's hard for your heat pump to do the job perfectly. If anything is blocked in the system, you have to clean the heat pump and clear away any debris that may be blocking the airflow way. 

Dirty air filter 
Air filters are used to catch dirt and debris in the system. When too much dust or dirt builds up on the filter, it may block airflow to the compressor. The compressor heats the air in the system. Check the air filter and replace it with a new one if it is dirty. 

The refrigerant charge is low 
If the refrigerant levels are too low, likely from a leak, your York heat pump system will struggle to bring enough heat indoors for heating your room. Hence, you have to check the refrigerant levels. If the levels are too low, the heat pumps need to be recharged.