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GlennLever · 09-20-2014, 03:16 PM

This topic kind of ties into one already started 8.3 Overheating but has to do with the A/C condenser.

I have discovered that the electric fan on the A/C condenser does not come on when the dash A/C is turned on. In a car this fan would come on as soon as the a/c is turned on, should that also happen in this motor home (1997 America Dream).

Before I start checking would like to know if that is how it should work.

If so the first thing I would check is, is there power at the plug, then I would hot wire the fan to make sure it is working, if it is the solenoid I would love it if someone could take a picture and describe it's location.

Should the fan be lowing into the condenser coil or sucking air out (not fighting the Motor Home fan)

Just a note, this may be another example of incompetent RV Service center repairs. At the beginning of the season I took it to Caledoina RV because the A/C was not blowing cold. They charged the system and pronounced all was well. On the next trip it did not work until we hit a big bump, and then it did work. It has worked off and on again ever since. It was taken back, but they stated all was well.

BoJango · 09-20-2014, 05:21 PM

Glenn, I just had my motor home AC repaired which required only minor repair. I know the fan should blow air over the coils and through the radiator. My mechanic had to repair a connection on the electric line near the fan. I am pretty sure the fan should come on when the AC is turned on. Maybe you can crank the engine, turn the AC on high and check and see if the fan is actually getting current.

GlennLever · 09-20-2014, 05:31 PM

Quote:

Originally Posted by Bo Walker

Glenn, I just had my motor home AC repaired which required only minor repair. I know the fan should blow air over the coils and through the radiator. My mechanic had to repair a connection on the electric line near the fan. I am pretty sure the fan should come on when the AC is turned on. Maybe you can crank the engine, turn the AC on high and check and see if the fan is actually getting current.

I'm going to try that in the morning, what would really help is if any one knows the location of the fuse, and the reply for the fan?

rsha · 09-20-2014, 05:42 PM

I had that happen to my MH. Turns out it was a bad relay. The fan should run when the AC is on an the key is turned on. If it doesn't then check the relays. Mine were located in a box enclosure next to the electric fan.

GlennLever · 09-20-2014, 07:06 PM

Quote:

Originally Posted by rsha

I had that happen to my MH. Turns out it was a bad relay. The fan should run when the AC is on an the key is turned on. If it doesn't then check the relays. Mine were located in a box enclosure next to the electric fan.

Wires disappear into the frame. the other side is very cluttered, I will look in the morning, would be nice if someone could save me the time of looking if they have addressed this problem before.

mojoracing · 09-20-2014, 10:23 PM

I have not addressed it on a diesel but I have on one of our trucks. That fan should blow immediately when the ac is turned on. You can usually tell when a fan is not working without even looking at the fan. While you are sitting still such as a stop light, the ac will blow warm. Once you start moving and natural airflow cools the coils the ac will blow cold again although maybe not as cold as it should. When this happens, I know the fan is not working properly. The last one I did was a bad fan motor.

GlennLever · 09-21-2014, 11:18 AM

Ok...This is what this morning revealed.

The A/C indicator light comes on when the dash A/C is turned on.

The A/C compressor comes on when the A/C is turned on and goes off when the A/C is turned off.

The fan over the A/C condenser will run when connected to a separate battery.

The test light does not light when connected to the terminals running to the fan.

The wires from the fan run into the engine compartment, across the rear frame then forward to the electronics compartment.

I find no fuses or relays marked as A/C fan, I do find one relay marked HVAC relay (which I have not tested). I also find one fuse marked RAD PWR AUX which does test good.

Can you help me locate both the fan relay and fuse?

Vehicle Vin 46GED1814T1052706

Fleetwood # 720AV5202890

MFD ID # 02890

Chassis sate 7/96

Vehicle date 1997

GlennLever · 09-22-2014, 08:49 AM

I received this from Fleetwood (print is for 93-96, I have a 97)

Glenn
The prints for the Gillig chassis electrical are attached. The dash AC has an automotive breaker in the front chassispanel.The rear panel has the AC relay andoutput to the ACcondenser fan motor.Hope this helps Thank you AMERICAN COACH SERVICE

GlennLever · 09-22-2014, 09:57 AM

New Fleetwood response.

You are looking at the GILLIG rear panel and the FLEETWOOD Battery control center.
The Gillig panel is the top panel.You really need assistance from
someone who knows Gillig chassis. They can be reached at 800-735-1500.
The print we have is the only info on Gillig we have. We normally don't have prints on chassis items but sometimes we get them and keep them for the future.

Give them a call.
Thanks

GlennLever · 09-22-2014, 10:03 AM

I have received a response from Gillig

Glenn, it looks as though the only relay we provide is the first one on the left side. You can also see a circuit breaker for A.C. is the fourth one down on the right. See attached drawing.

The print is the same print from Fleetwood.

GlennLever · 09-23-2014, 08:12 AM

Gillig is GREAT.

They have sent me the correct diagram.

GlennLever · 09-23-2014, 03:37 PM

Ok...here we go.

You have seen the earlier diagnostics that I did.

Fleetwood was unable to get me the correct diagram, but the customer service at Gillig came through.

With the correct diagram in hand, I found the correct circuit breaker for the A/C circuit and found it had been replaced with an aftermarket one with no indication if it was tripped. I tested it and found it was good. The correct one has been ordered from Gillig.

The relay labeled HVAC on the Motor Home is the A/C fan relay in the print. I found that the HVAC relay had been "played" with and the case was broken. I removed the relay and checked the hot lead and coil lead and found them to be hot. I jumpier the two contact leads and the fan ran.

I ran to the parts store an picked up a universal A/C relay and plugged it in and all works as it should fan on when A/C is on, fan off when A/C is off.

The correct one has been ordered from Gillig.
The spot that the relay goes is tight.

I snapped the relay into place and this will work for now, until I get the correct parts.