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A bad bearing or bad cap on an RV heatpump Coleman #6537

I have a bad bearing (most probably) or bad cap on the outdoor evap fan motor on a coleman 6537 heat pump installed in a Itasca 40KD. I need a repair manual that shows where the access to this motor is! (not accessible from in front, doesn't look good from the rear or sides and I see no way of getting at this motor from the bottom). Before I pull the bed, cabinets carpet and flooring to get at the top I would like to know if that is in fact where the access is.

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Go up top and start taking apart after ya replace the motor clean the condenser and evaporator best performance .Tom

Posted on Jun 18, 2009


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017


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Coleman ac roof rv model #6702a808 wiring to fan motor#1468a3069 diagram.

Request the fan motor wiring diagram directly from Coleman.

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If it trips the circuit breaker as soon as you turn the FAN on, suspect either a bad fan motor or a failed fan motor start capacitor. If you are able to turn the fan on but the circuit breaker trips as soon as the COMPRESSOR starts, it is possible that the compressor is seized.
If, on the other hand, the unit is tripping a GFCI (Ground Fault Circuit Interrupter) breaker or GFCI utility outlet, it is possible that neutral and hot are reversed at the outlet into which the trailer is plugged (happened to me this year at an RV park).

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1 Answer

Mach III Air Conditioner: i have a coleman mach I rv air conditioner. Last ...

Hi, its very possible the capacitor is open or shorted. Look it over to see if it is leaking oil or swollen or even deformed. When installing a new condenser fan motor, they should sell you a new run cap with it. Its probably a 5 uf 370 volt cap and you can have it checked to see if its putting out the right amount of micro farads. If it shows any of the signs I have said, the cap is bad and you will need a new one. Does the motor spin free? If you have a meter, a digital is best, you can check to see if the motor is open or shorted to ground. Set the meter on continuity, and check each lead to ground. If it is open, your meter will show no reading. If shorted to grd, you will have a reading or a beep if your meter has that option on it. This is how you will know. If it would be best for you to take off the run cap and take it in, they can check it for you where you bought the motor. Its not unusual to loose a motor in a year as they work hard in the heat. I have seen them last for years and for just a couple of months. Keep me posted.
Best of luck to you,

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1 Answer

We have a Coleman 7300 rooftop ac unit. When the

The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of
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Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

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This could be the problem. It is more likely that the motor bearing is bad. Take the fan capacitor and have it tested. Or replace it, (under $20). Was the fan motor loud before this happened? Hopefully it is just the capacitor, the motor runs $60 - $100 and is a FUN to replace.

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