cancel
Showing results forย 
Search instead forย 
Did you mean:ย 

Motorhome heat pump troubles

guthriez
Explorer
Explorer
Our motorhome's two-ton Coleman heat pump is suddenly drawing too many amps to run on 30-amp service. On 50-amp service it runs ok, and when we use our 8KW generator it runs fine too. We've changed the filter and it doesn't make a difference. The Powerline Energy Management system indicates it's drawing close to 40 amps. The model number is 6537-871. We're in Tucson for the next couple of months and would like to get this fixed sooner rather than later. Any suggestions or recommendations? Thanks for any ideas!
The Guthaways
2008 Palomino Gazelle
2008 Jeep Grand Cherokee Diesel
12 REPLIES 12

John_Joey
Explorer
Explorer
guthriez wrote:
OP here. Thanks all for your assistance.

Finally got into a service place today and they replaced the two RUN capacitors. All seems to be well now. So glad it wasn't more serious!


So Doug was right. Good job.
Thereโ€™s no fool, like an old fool.

guthriez
Explorer
Explorer
OP here. Thanks all for your assistance.

Finally got into a service place today and they replaced the two RUN capacitors. All seems to be well now. So glad it wasn't more serious!
The Guthaways
2008 Palomino Gazelle
2008 Jeep Grand Cherokee Diesel

Mandalay_Parr
Explorer
Explorer
Ask around.

Jerry
Jerry Parr
Full-time
2005 Mandalay 40B
Cat C7 350, 4 Slides
Blue Ox, Brake Buddy
2004 CR-V Toad
jrparr@att.net
602-321-8141
K7OU - Amateur Radio
Kenwood Radios
ARRL, W5YI, & LARC VE
SKYWARN Weather Spotter

guthriez
Explorer
Explorer
OK. Now I'm nervous. We'll just call a repair tech. Any recommendations in the Tucson area?
The Guthaways
2008 Palomino Gazelle
2008 Jeep Grand Cherokee Diesel

gat75
Explorer
Explorer
Mandalay Parr wrote:
I would have an AC tech come out and check it out.


X2,
You may replace several "easy-to-change components", only to find that the problem still exists.

Then there is the safety issue... You would hope the breaker trips off (if this issue continues).

A defective breaker has potential of causing fire. You may need to have the breaker replaced (if your unit is actually drawing excess amps).

dougrainer
Nomad
Nomad
guthriez wrote:
Thanks folks. We'll address the capacitor situation in the morning. Temps here have been well into the 50s, so that shouldn't be the problem. Will advise ASAP.


You stated 40 amps from your EMS system. THAT figure should include ALL the 120 appliances running. Did you take that into account for the total amp draw? You need to shut down all 120 appliances (Water heater/refer/TV's/Inverter/charger/anything on 120, then check your amp draw. At 24 amps for your HP, that leaves only 6 amps available before the EMS starts shedding the loads. Doug

guthriez
Explorer
Explorer
Thanks folks. We'll address the capacitor situation in the morning. Temps here have been well into the 50s, so that shouldn't be the problem. Will advise ASAP.
The Guthaways
2008 Palomino Gazelle
2008 Jeep Grand Cherokee Diesel

Ductape
Explorer
Explorer
Low voltage causes high amp draw. Check voltage at the unit, and if it's low then check the pedestal and points in between until you find where the difference arises. Could be just one loose connection.
49 States, 6 Provinces, 2 Territories...

DownTheAvenue
Explorer
Explorer
Typically, when any A/C starts drawing excessive amps, the compressor is in the early stages of failure. While I hope that is not your case, the odds are not in your favor.

Ivylog
Explorer III
Explorer III
Are you sure it's not maybe using heat strips instead of the heat pump? How cold out is it?
This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.
Sold 04 Dynasty to our son after 14 great years.
Upgraded with a 08 HR Navigator 45โ€™...

Mandalay_Parr
Explorer
Explorer
I would have an AC tech come out and check it out.
Jerry Parr
Full-time
2005 Mandalay 40B
Cat C7 350, 4 Slides
Blue Ox, Brake Buddy
2004 CR-V Toad
jrparr@att.net
602-321-8141
K7OU - Amateur Radio
Kenwood Radios
ARRL, W5YI, & LARC VE
SKYWARN Weather Spotter

dougrainer
Nomad
Nomad
You have 2 compressors. try to run each compressor separately to determine WHICH is pulling the excess amps.EACH compressor on your model only pulls 8.3 amps. The TOTAL amp draw on your unit with both compressors running and fans is 23.8 amps. If you have a defective compressor the odds are the amp draw would continue to go up until the overload or 120 breaker would trip. The odds are your RUN capacitor for the compressor or both is defective. Since capacitors are cheap, I would replace BOTH compressor run capacitors since your system is older. It may be both run capacitors are bad and the reason your amp draw is so high. Doug