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Old 08-11-2019, 01:00 PM   #1
pyrobow
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Default Camper AC guit.

I was setting in the Camper with the AC running. I started to notice a hum and the AC had shut down. I shut it of and turned it back on. Nothing. No fan only or anything. I checked the power, still on.

9 year old Dometic 13000 ducted unit.
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Old 08-11-2019, 01:19 PM   #2
Snakelover
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My money's on start capacitor. I replaced mine not too long ago. Dirt dobbers had gotten into the compartment and probably shorted it out. I ended up replacing all three capacitors, since it's not much more trouble to replace them all as one and they were all the same age.

Edit: I don't think my fan ever quit, though. So I could be way off base.

Last edited by Snakelover; 08-11-2019 at 01:32 PM.
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Old 08-11-2019, 01:24 PM   #3
fbchunter
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Carey birdwell, if spelled right, is the camper expert on this site if I remember correctly. He can usually give good advice
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Old 08-11-2019, 01:27 PM   #4
pyrobow
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I agree, Carey is the man.
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Old 08-11-2019, 02:26 PM   #5
Huntindad
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were you on generator or house current?

if generator...may want to check to see if it is producing enough juice.
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Old 08-11-2019, 02:47 PM   #6
pyrobow
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House current
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Old 08-11-2019, 02:52 PM   #7
doghouse
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Microwave light on?
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Old 08-11-2019, 04:27 PM   #8
scotth89
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Sounds like the fan motor.
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Old 08-11-2019, 05:24 PM   #9
pyrobow
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Fan spins free but i guess it count be out.
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Old 08-11-2019, 05:43 PM   #10
ecallarman
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A way to test if it is a capacitor is to take the top shroud off, turn the unit on and give the fan a good spin by hand. If the fan starts, then it's the capacitor. At least that's the way I diagnosed mine.

Last edited by ecallarman; 08-11-2019 at 05:56 PM.
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Old 08-11-2019, 08:21 PM   #11
pyrobow
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I can't get on it until Saturday morning. It is to hot to get on that rubber in the afternoon.
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Old 08-11-2019, 08:32 PM   #12
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Does the tstat have power?
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Old 08-11-2019, 08:35 PM   #13
careybirdwell
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Quote:
Originally Posted by ecallarman View Post
A way to test if it is a capacitor is to take the top shroud off, turn the unit on and give the fan a good spin by hand. If the fan starts, then it's the capacitor. At least that's the way I diagnosed mine.
Yes, it sounds like a fan cap. You are probably hearing the compressor humming. Have someone turn the fan on, get on top, and spin the fan blade. If it takes off, it the capacitor, it not, probably the fan.

Every once in a while, especially on dometic a/c. If you have a ducted system, it could be your relay boards. I actually replace more relay boards on Dometic systems, and I replace more fan motors & capacitor on Coleman system

Good Luck
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Old 08-11-2019, 08:37 PM   #14
doghouse
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Campers are crazy. 12 volt controls the thermostat to the heater and a/c. Might try a battery charger to the camper battery. I know it's strange.
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Old 08-11-2019, 09:34 PM   #15
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Sorry to hijack the thread, but I have a question for Carey. On the ac on my brothers boat, (I am a 40 yr ac tech) which is a heat pump, when the unit shuts down, after 10 seconds or so, it appears that the orifice that is in the LL a few inches out of the condenser coil, releases pressure, sounds like the reversing valve, but all the lines there stay at the temp they were at shutdown. Now I assumed the orifice that is crimped in the LL is just a fixed orifice, so I wonder why there is a pressure release after shutdown. The unit cools just fine, but the noise at each shutdown sounds like the reversing valve shifts . I watched several cycles, and it is definitely coming from the orifice.


And OP, surely sounds like the fan capacitor.
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Old 08-11-2019, 09:51 PM   #16
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Good luck Pyrobow. Great info for the RV tool chest.
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Old 08-13-2019, 06:24 PM   #17
pyrobow
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Well I turn it on and spun the fan. Nothing. Fan did not try to kick in. There was no noise of any ki d fro. The thermastat or a ac unit.
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Old 08-13-2019, 07:08 PM   #18
Muddy Bud
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Just had the same problem on mine this morning. It ran for about an hour while I was filling feeders. Come back and the A/C was off. Thermostat was set at 73. It was probably 95 outside and 100 inside. I turn it off and back on, I hear it humming but nothing blowing out.
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Old 08-13-2019, 09:16 PM   #19
pyrobow
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Found it. Simple problem. Weak camper battery
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Old 08-13-2019, 09:22 PM   #20
careybirdwell
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Quote:
Originally Posted by pyrobow View Post
Found it. Simple problem. Weak camper battery
You might also have a converter issue because if you are plugged into 120V, your converter should be giving you a good 12V and also keeping your battery charged
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Old 08-13-2019, 09:27 PM   #21
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Quote:
Originally Posted by pyrobow View Post
Found it. Simple problem. Weak camper battery
You didn't read my response. All controls are 12 volt except for the microwave.
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Old 08-13-2019, 09:33 PM   #22
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Quote:
Originally Posted by doghouse View Post
You didn't read my response. All controls are 12 volt except for the microwave.
You got it. I thought he originally said it was humming which would mean the tstat turn on the compressor
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Old 08-13-2019, 09:42 PM   #23
pyrobow
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I thought I heard a hum. Bad hearing.
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