Replacing roof A/C unit

That problem happened with my ac. It turned that the fan under the cover on the roof had come lose. Tightened it and the price blemish was fixed. Worth checking before replacing.

"price blemish" ??

Most AC units consist of upper and lower components. I had to change out a upper AC section due to the loss of a compressor once. I bought the upper unit of the same brand and size, removed 4 bolts clamping the faulty unit to the roof, then unplugged lower unit. Replaced the upper unit with new foam roof gasket, plugged in harness and replaced bolts. I had a neighbor with a forklift to raise and lower the AC unit, which made the job easy.

I would check the amp draw first. You could have a bad breaker.

You need to match. If controlled by a thermostat on the wall then get one controlled by a thermostat on the wall. It could be one with controls mounted on the unit then match that

Without know more about the brand of AC it hard to advise. If it's a Dometic the 5 button Tstat will not work with a newer unit without an adapter board.

I just had my Dometic unit replaced as it had quit. Bad compressor. Only the upper unit had to be replaced. I had a mobile RV service come out to do it.

Thanks guys for your reply's

Check and replace the start capacitor

billyboy wrote:
Check and replace the start capacitor

I called an RV company and they say my A/C (1997 Coleman)is too old and they don't make a replacement capacitor any longer. That doesn't sound right to me. Capacitors as far as I know is a capacitor and as many as there are out there I would think there would be one that I can buy for it.