McQuay PDAE - User Manual

Questions and Answers

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Anthony StrongAug 19, 2025
How to fix McQuay Air Conditioner when blowers won’t operate on cool?
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  Eric SantosAug 19, 2025
  If the McQuay Air Conditioner blowers won’t operate on cool, start by checking the supply line fuses and circuit breakers to ensure power is on. Blown fuses indicate a potential circuit overload, short circuit, or ground condition. Verify the voltage supply to the equipment is within 10% of the voltage specified on the data plate. If the power supply is adequate, the issue might be a faulty touchpad/thermostat, which would need replacement. Also, check for loose connections at the push-button switch and tighten them if necessary.
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Marcus MclaughlinAug 22, 2025
What to do if compressor starts and runs on cool but blowers do not run on McQuay PDAE Air Conditioner?
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  Diane SchneiderAug 22, 2025
  If the McQuay Air Conditioner compressor starts and runs on cool, but the blowers do not run, the issue might stem from several causes. First, a faulty touchpad/thermostat could be the problem and require replacement. Alternatively, the blower motor might be open circuited, also necessitating replacement. Check if the blower is rubbing against its housing and adjust the blower motor or blower wheel position. Seized bearings on the blower motor could also be the cause, requiring motor replacement. Lastly, ensure there are no loose connections at the touchpad/thermostat, and tighten them if found.
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Melissa JacksonAug 25, 2025
Why is my McQuay Air Conditioner making too much cooling?
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  andremclaughlinAug 26, 2025
  If your McQuay Air Conditioner is making too much cool air, first adjust the thermostat, as it might be set too low. If adjusting the thermostat doesn't solve the problem, the thermostat itself might be defective and need replacement.
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josepharmstrongAug 28, 2025
What to do if compressor starts and runs on cool, but fan motor starts, then stops on McQuay Air Conditioner?
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  Cameron ReyesAug 28, 2025
  If the McQuay Air Conditioner compressor starts and runs on cool, but the fan motor starts and then stops, it could be due to the operation of the internally connected overload device caused by a short circuit in the blower motor, requiring the motor to be replaced. Alternatively, it could be due to windings, rubbing of the blower wheel, or a lack of lubrication in the blower motor bearings. In this case, adjust the blower wheel or motor, or replace them if necessary.
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Rachel WilliamsSep 3, 2025
Why is my McQuay Air Conditioner “Sweating?”
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  lbrownSep 3, 2025
  If your McQuay Air Conditioner is “Sweating,” it could be due to several reasons. First, check if the condensate drain from the evaporator to the condenser is plugged and remove any obstructions to water flow. Also, inspect the insulating seals on the equipment for damage and adjust or replace them as needed. Ensure the evaporator blower motor is running at the correct speed by checking for correct voltage and replacing the motor if necessary. Finally, verify that the evaporator blower is correctly positioned and tighten it if it is loose.
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Holly EricksonSep 5, 2025
What to do if blowers run on cool and compressor starts but stops after a short interval on McQuay Air Conditioner?
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  Steven JosephSep 6, 2025
  If the McQuay Air Conditioner blowers run on cool and the compressor starts, but then stops after a short interval, it could be due to the operation of the overload device because of an overloading compressor motor. Check the voltage supply and clean the condenser inside and out. Inspect the outside face of the condenser for recirculation of condenser air and install air “splitters” if they are missing. Check the compressor for a short circuit. If the compressor is defective, ship the cooling chassis to the nearest McQuay authorized warranty station.
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waterslindsaySep 9, 2025
How to troubleshoot McQuay PDAE blowers that won’t operate on Heat?
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  Nicholas JonesSep 9, 2025
  If the McQuay Air Conditioner blowers won’t operate on Heat, first check the power supply, fuses, and circuit breakers. If power isn't the issue, ensure the heat is on by opening the heat valve or turning on the heating system (for equipment with heat fan lockout). If those aren't the issues, a faulty touchpad/thermostat might be the problem and need replacement. Also, check for loose connections at the touchpad/thermostat and tighten them. Finally, make sure the thermostat isn't set too low; adjust it by rotating the control knob to “warmer.”
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Holly BakerSep 12, 2025
What causes the compressor to occasionally stop on McQuay Air Conditioner?
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  Nicole GreenSep 12, 2025
  If the McQuay Air Conditioner blowers run on cool and the compressor starts and runs, but the compressor occasionally stops (on overload device), it could be due to low voltage from overloaded circuits within the building or the local power system, especially during peak demand times. In this case, run a separate electric line to the equipment or consult your local power company. High voltage due to fluctuations in the local power system, typically during low load periods, can also cause this issue, so consult your local power company as well. A partial short circuit in the compressor motor might also be the cause; if confirmed, ship the cooling chassis prepaid to the nearest McQuay authorized warranty station.
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Sheri VaughnNov 15, 2025
What to do if McQuay PDAE blowers operate on cool but compressor does not start?
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  Kelly CookNov 15, 2025
  If the McQuay Air Conditioner blowers operate on cool, but the compressor doesn't start, first, make sure the thermostat isn't set too high by rotating the control knob to “Cooler.” Then, check if the heat valve is open and close it. Low voltage could also be the culprit, so check the power supply, fuses, and circuit breakers, ensuring the voltage is within 10% of the data plate value. Other potential causes include a faulty touchpad/thermostat (replace it), loose or defective connections at the touchpad/thermostat or compressor terminals (tighten or replace them), defective wiring to the thermostat or compressor terminals (replace it), a malfunctioning starting capacitor (replace it), or a defective compressor motor. For a defective compressor motor, ship the cooling chassis prepaid to th...
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obrienhowardDec 1, 2025
Why is my McQuay PDAE equipment noisy?
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  fdouglasDec 1, 2025
  If the McQuay Air Conditioner is noisy, several factors could be responsible. The blower might be rubbing against the enclosure, in which case you should adjust the fan position on the motor shaft or reposition the fan motor bracket assembly. Dry blower motor bearings can also cause noise, requiring motor replacement. Check for loose blower hold-down nuts on the motor-bracket assembly and align the blower assembly before tightening the nuts. Refrigerant absorbed in the compressor oil after an extended shutdown can also cause noise, but this should disappear after the equipment runs for a while. Ensure the equipment is properly installed and make any necessary adjustments to components. If the damper solenoid hums, check for proper adjustment and apply silicone oil or grease to the gap betw...