Does anybody know what model of AC I might have

[kpicard]

I have a 1976 Sovereign and the air conditioner doesn't cool so I would like to get it fixed or something. I would like to know if somebody knows what is the best solution and what model I have. Thanks Ken

[RichardT]

Originally Posted by kpicard

I have a 1976 Sovereign and the air conditioner doesn't cool so I would like to get it fixed or something. I would like to know if somebody knows what is the best solution and what model I have. Thanks Ken

It is impossable to determine by just the year and model of your coach as it may or not be the original. If it is original it is most likely an Armstrong. Look thru the vents where the air comes out and you should see a tag with brand and serial/ model # and name of manufacture. Hope this helps.
The best bet is to take it to an A/C tech and see if it needs a charge or ?
If it does need a charge you should be able to have it converted to the new 134a instead of the expensive freon.

[Inland RV Center, In]

kpicard

The original factory installed airconditioner for a 1976 model was Armstrong TR25-14.

It is an excellent AC unit and was used from 1976 to 1979.

As with anything else mechanical, it probably just needs to be serviced.

Many parts are still available for the Armstrong AC units.

Andy

[davidz71]

The Armstrongs were built to commercial specs and are tough units. The one on my '77 Excella 500 was not blowing cold air so I used a wire jumper on the thermostat (actually under the inside thermostat cover). The compressor still did not energize. I took the cover off the AC and measured the voltage into the transformer on the streetside of the unit and then the low voltage side. 125 v. going in and 14 or so going out. It should have been 24 volts best I can remember. I then measured voltage at the thermostat and found that it was only 9 volts. I went to an electrical supply house and found a transformer that met the specs in the manual. It was a little larger than the one it replaced but as soon as it was wired up and the thermostat turned to a lower setting, the compressor energized. Good cold air.

Freon was just a little low so I had a friend with proper equipment top it off. Maybe all you will need is freon but check your service manual if you have one to find the jumper locations at the thermostat for a quick check. If not, PM me and I will check the manual to give you the right spot.

[davidz71]

short between Y and R terminals (noted on your wall thermostat after removing the cover) with a short piece of jumper wire. This is a low voltage circuit. If the comp. relay closes, thermostat is defective or circuit to transformer is faulty.

I went back to my post made a few years ago and pulled it up. If the thermostat post aren't labeled then PM me.