Our a/c window unit will not work. When we turn it on, it powers up but does not kick in. We don't hear the fan inside rev up. From time to time we would hear a squelling noise when we would turn it on but it would go away after the unit was completely on. I thought maybe it needed some oil. Now it won't come on at all. Is it possible the fan belt has popped or does it sound like something major?
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Re: Whirlpool A/C Model #ACQ158XP
Unfortunately, your model does not have a fan belt so you may need to have it serviced by a technician. Prior to calling one, clean the room air filter and hose off the coil from the outside if you can get to it. Unplug the unit first. The squealing may be a dry bearing in the room air fan. If you can get to the fan, put 2 or 3 drops of electric motor oil on the fan shaft and work it into the motor housing by hand. Make sure you are getting power at the outlet. If so and the unit does not show any signs of life (lights or a fan), probably the fuse inside the unit has blown and will need replacing.
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Its really tough to troubleshoot window units without pulling the cover off. If I was standing there looking at it without tools in my hand I would first make sure the fan/cool switch was in the fan high cool mode and that the thermostat was turned all the way to the coolest setting. Beyond that it needs to go in for repair. Wish I could be more help. Good luck.
I passed this question the first time I read it, so I will take a stab at it now. The fans don't come on until the compressor has pumped the freon pressure up to say 150 or 200 psi. And the compressor clutch has to have voltage to engage the clutch. I wonder if the clutch is going and needs 14 volts instead of 12 to engage ? Or the relay that powers the clutch ? Speeding up the engine would increase voltage from the alternator. This is assuming the serpentine belt is tight and everything else is working correctly. I think I would swap the relay with another and put a meter on that circuit to the ac clutch to see what it takes to engage it.
I believe the fan is designed to run all the time, and no, it costs very little to run an 18w fan. You can use a timed socket, or switch it on and off when needed. I don't believe the Haier has specific switching times.
It sounds like the unit may be over charged. Make sure the outside coils are clean and you have plenty of airflow coming out of the top of the outside unit. What could be happening is, when the temps get higher outside, so do the pressures in the system. The compressor has a thermal overload protection that will kick the compressor off if it gets to hot, which if the compressor is over charged, it will work twice as hard, over heat and shut off. You would need a technician to come out and get the refrigerant charge back to normal. Another thing that could be happening is a weak or faulty capacitor, which is a small round or oval metal object, found in the electrical compartment on the unit. This are fairly simple to change out if your comfortable with electric. I've also had to put what's called a hard start kit on compressors with the same problem, new and old. The hard start basically gives it that extra boost of power to get it up and going. I would start with the refrigerant charge and go from there. The electrical "humming" sound that you hear unless you turn the breaker to the furnace off, is the contactor on the outside unit having a call for cooling. The 24 volts come from the furnace, to the outside unit, and pulls the contactor in to power the unit with the 220 volts supplied. It is normal and you don't have to worry about that at all. I hope some of this helps and good luck!