Community Forums

feras · 03-23-2025, 06:43 PM

my rv is american eagle 40l 2005

The dash air conditioner compressor is broken. The compressor has been replaced, but when I turn on the air conditioner from the control, the compressor does not work because the 12v does not reach it. I need to KNOW where the compressor fuse location and what I should check if can help me.
or any one have user manual for dach ac

OMMM4747 · 03-24-2025, 02:34 PM

Of note, if your AC system is empty (no refrigerant) the compressor will not turn on. If no refrigerant, the system will need to be purged of air (vacuum pump) and refilled w/refrigerant. Don't know where or if there is a fuse.

Good luck

feras · 03-25-2025, 07:02 AM

I have already replaced the compressor and filled the air conditioning gas, but the compressor is still not working because no electricity is reaching it.

Old Scout · 03-25-2025, 07:23 AM

Vehicle fuse, dash switch, trinary pressure switch, freeze probe--all can interrupt 12v. Are you sure its not the compressor clutch or wire connection vs no 12v power?

mike toon · 03-25-2025, 09:44 AM

How did you charge the AC system if the compressor didn't come on, as you state 12 volts.

feras · 03-26-2025, 06:57 AM

Yes, the electricity was working regularly and the air conditioning was working well.
But the compressor damaged while I was on the road and the belt was cut.

I replaced the compressor with a new one, but when I filled the gas, the compressor did not work. After checking, it turned out that the 12V were not reaching the compressor.
I connected an external 12V power supply to the compressor to make it work and filled it with gas.

The fuse works, but as for the relay, I don’t know where it is located. I tried to search, but unfortunately I don’t have any wire map or user manual , and I’m confused.

This is what happened

mike toon · 03-27-2025, 05:52 AM

the compressor wont work until there is enough freon in the system. Did you vacuum the system for over an hour.
How much freon did you put into the system.
Take it to an auto shop that repairs AC and have it diagnosed properly.
good luck

RVfixit · 04-01-2025, 03:27 PM

Yes, I have to agree with everyone. If your old compressor froze and needed to be replaced, then there are a couple of other pieces that should have been replaced to prevent the new compressor from failing. As already mentioned, there is a safety switch on the filter dryer usually but it can be in the low side line as well. If that switch is open (no or low Freon) there won't be 12 volts to the compressor by design.

You also mentioned that you ran a jumper to the compressor, did it come on and did the AC get cold?

Finally, how much Freon did you put in? Without evacuating the system (putting a vacuum on it as mentioned above), I don't think you got a full charge into the system and risk freezing up if you didn't evacuate the moisture and air out.

I think an AC shop is in your future.

Good Luck and Safe Travels!

kbmiddle · 04-04-2025, 06:28 PM

I have a problem with my dashboard heat/cooling in that the fan doesn’t come on in any position. Anyone know where the fuse is located. I’ve checked all the fuses in the box and they test good. Could be a relay or rheostat if I knew where to find them. Any ideas?

2001 American Eagle 40’ on Spartan Chassis

feras · 04-05-2025, 09:59 PM

Quote:

Originally Posted by kbmiddle

I have a problem with my dashboard heat/cooling in that the fan doesn’t come on in any position. Anyone know where the fuse is located. I’ve checked all the fuses in the box and they test good. Could be a relay or rheostat if I knew where to find them. Any ideas?

2001 American Eagle 40’ on Spartan Chassis

Yes, there is a special relay for the fans that disconnects the entire air conditioning system. It is located in the fuse panel. You must replace the faulty one.

kbmiddle · 04-06-2025, 08:25 AM

Thanks. I see several different relays in the fuse panel box but don’t see a way to check them other than to replace them. I ran into this on a friend’s Tiffin and we resolved by replacing each one until we found the bad one. There are different ones and I don’t have a diagram to show me which controls the fan so I’ll just get one of each.

SLOweather · 04-06-2025, 08:32 AM

If the A/C system is an Evans TempCon, find the heavy wires from the actual blower and trace them to a large black 2 wire connector that connects the blower to the chassis wiring. The wires are probably 12 gauge.

That connector in my Sunstar overheated from a high resistance internal connection and fused the halves of the connector. I had to cut the bad connector out and splice the wires together.

Else it could be the speed control resistors mounted on the blower housing. Be careful removing that. There might be a threaded backing plate in the housing for the screws. It will fall into the housing and it a b***h to put back.

Quote:

Originally Posted by kbmiddle

I have a problem with my dashboard heat/cooling in that the fan doesn’t come on in any position. Anyone know where the fuse is located. I’ve checked all the fuses in the box and they test good. Could be a relay or rheostat if I knew where to find them. Any ideas?

2001 American Eagle 40’ on Spartan Chassis

feras · 04-07-2025, 05:39 AM

Quote:

Originally Posted by kbmiddle

Thanks. I see several different relays in the fuse panel box but don’t see a way to check them other than to replace them. I ran into this on a friend’s Tiffin and we resolved by replacing each one until we found the bad one. There are different ones and I don’t have a diagram to show me which controls the fan so I’ll just get one of each.

The method of checking the relay is very simple. I will leave you a clip from YouTube that shows you the method of checking, and I am sure that once you replace it, your air conditioner will work because if the air conditioner relay is damaged, the air conditioner and the fan will stop completely.

https://www.youtube.com/watch?v=snV2...Go-Yy&index=78

kbmiddle · 04-07-2025, 08:53 AM

Thanks for the responses. Not sure what type AC unit I have but this gives me a direction to explore if the relay isn’t bad. I purchased one yesterday but I haven’t changed out yet. The problem began intermittently for several times before it completely quit so it would seem the relay is more likely as the 30 amp fuse remains good.
That is a very detailed and informative video on checking out relays.