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Question about testing capacitors on my camper a/c
Posted on 5/18/20 at 9:32 pm
Posted on 5/18/20 at 9:32 pm
This capacitor reads 48 on my meter. Does that mean the capacitor is good? It's on a Dometic ac on the roof of my camper. The compressor isn't staying on. It'll buzz for a few seconds and the lights will dim and then it cuts off. The fan works fine, just no cold air. Was working fine one day then not the next.
This is the meter I'm using
This is the other capacitor
It reads 44.2 at the HERM terminal and 9.8 at the fan terminal
This is the meter I'm using
This is the other capacitor
It reads 44.2 at the HERM terminal and 9.8 at the fan terminal
9
Posted on 5/18/20 at 9:40 pm to Slim Chance
Posted on 5/18/20 at 9:42 pm to Slim Chance
You gotta get the camper up to 88 mph before it will work.
Duh.
Here’s the capacitor:
Duh.
Here’s the capacitor:
Posted on 5/18/20 at 9:43 pm to Slim Chance
The capacitors are made in Mexico. You need a metric meter.
The second one is less than $13, delivered, from Amazon. I am sure you can replace both for less than $40.
Or you can check and see what the Ohm resistance is supposed to be and meter it for that.
The second one is less than $13, delivered, from Amazon. I am sure you can replace both for less than $40.
Or you can check and see what the Ohm resistance is supposed to be and meter it for that.
Posted on 5/18/20 at 9:59 pm to Slim Chance
Thermostat control board (in the overhead unit) is the most common issue with those. Change the thermostat too for about $20 more.
Posted on 5/18/20 at 10:00 pm to Slim Chance
Capacitors seem to test fine.
This post was edited on 5/18/20 at 10:04 pm
Posted on 5/18/20 at 10:42 pm to Slim Chance
Put your tongue on it
Posted on 5/18/20 at 10:51 pm to Slim Chance
Could be many things but my money says if your compressor is actually starting (is it?) and then stops running, then the run capacitor is probably bad or failing. Regardless of the reading of the capacitor it can still be bad. Replace the run cap first.
Posted on 5/19/20 at 12:05 am to Slim Chance
The first capacitor is a start capacitor and is connected to a small switch with three terminals on it (potential relay). That is what you need to replace.
Posted on 5/19/20 at 8:49 am to Slim Chance
You came to the right place. That’s just what we specialize in. 
The OT is your go to resource for all answers to anything that you have questions on in life.
The OT is your go to resource for all answers to anything that you have questions on in life.
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