Replacing TT AC
I have to replace the rooftop part of my four year old Dometic AC. It went out last Summer and I'm just now getting around to it. Back then I did some research and it seemed there were several places ...
Forum Discussion
DFord wrote:
I can't imagine why no one has told you the truth here. That's the compressor in the picture and those are the wiring terminals! The wires are stuck on the terminals with spade connectors. I'd try to pull them off and then "ohm out" the compressor to see if it's shorted or open. If it ohms out correctly, I'd clean up the terminals and re-attach the wires.
The wire from the "Klixon" (overload) to the "Common" terminal on your compressor is burned up. The terminals are called "Common" - "Start" - "Run". Clockwise from the terminal that's burnt.
If the compressor ohms out okay, I'd try replacing the Klixon and the capacitors to see if the compressor will run before scraping out the whole thing.
https://www.wikihow.com/images/thumb/6/6a/Check-an-AC-Compressor-Step-10.jpg/aid9606691-v4-728px-Check-an-AC-Compressor-Step-10.jpg (After viewing this image, use the "back button" on your browser to return to this message.}
I borrowed this image and text from this link: https://www.wikihow.com/Check-an-AC-Compressor
Purchase a multimeter and set it to continuity. There should be a dial on the front of your multimeter. Set this dial to continuity so that you can test each individual terminal to determine where the fault is. Continuity tests whether there is an electrical flow between the terminals. If there is no flow, it’s likely that the terminal is broken or damaged.
If you can get the numbers off the Klixon, you can get a replacement online. Local suppliers are usually reluctant to sell to the customer.
The Klixon is attached to the COMMON Terminal.
The White wire is on the RUN terminal.
The Red wire is on the START terminal.
If the OP uses a meter on those terminals , Have on safety goggles as it's not BS that using a meter on compressor terminals sometimes blows out the terminal.. I know from experience. It's rare but can happen and oil & refrigerant in the face isn't fun.
Original post led me to believe some AC hack had already tested & told him unit needed replacing because the capacitor "cannot " be replaced per tester. Only now shows compressor with appearance of bad terminals. While getting klaxon get a terminal repair wireing kit that has the leads with pre-crimped terminals. Without the crimping tool you'll have bad connections most of the time.
