Question about Dometic Rooftop RV Air Conditioner

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Dometic roof top model 630516.321 cools ok wont heat ?

Heat pump side not working cools ok

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5 Suggested Answers

  • 230 Answers

SOURCE: will not shut off

Sounds like a stuck relay on the unit itself. Maybe there is a short in the control wire that comes from the thermostat that activates the fan.

The thermostat probably has one hot wire at all times. The thermostat then chooses which wire to send the voltage down based on your selection. One of those wires is probably for the fan only. Make sure that it is in good condition (no bare, pinched or wires)

Posted on Jun 17, 2008

SOURCE: dometic ac/heat pump

Would suggest it is drawing excessive current, make sure both fans are going, (inside will cycle low/high), or possible faulty reversing valve solenoid, or could be as simple as loose wire connection, how long does it run for and is it on the same 20amp breaker as the rear?if so start by running only the front unit in cooling 15/20min, check fans running, no unusual bearing noises, switch off for 60 sec then back on heat mode, if unit runs without stopping rewire onto separate circuit, if inside fan not working on heat check bi-metal switch in the airway, if running for a while, fans going but not very warm, check reversing valve.
Note, electrical's should be tested by someone who are qualified in the field.

Posted on Nov 06, 2008

  • 1 Answer

SOURCE: Older Penguin roof shroud, new style fit?

I just replaced my two 620315.321 shrouds with the newer style without any problems. I went to the Camping World site (and called them) with model no. and they knew what to send me. I also found that they had the best price at $79.00 (member price) with free shipping.

I didnt check your shroud part no.s, but think you will be ok if you do as I did.

If you have any question about installing, you can email me at remeola@comcast.net

Posted on May 05, 2009

lbeng
  • 1 Answer

SOURCE: FAN SHUTS OFF BUT COMPRESSOR KEEPS RUNNING - 6 MONTHS OLD

Depending upon the model of your air conditioner, this may be normal operation.

My newer Dometic air conditioner will run the compressor in a "reverse" mode without the fan occasionally in order to heat the coils. This is done to defrost the coils. After the frost is gone, the fan switches back on and everything goes back to normal.

Posted on Jun 30, 2009

  • 266 Answers

SOURCE: RV Dometic Duo Therm roof top AC w/heat pump Model

If the Air comeing out is the same as the temp inside the RV make sure the compressor is running and not just the fans. It could be low on freon. If freon is ok then you would need to ck the wiring to the selector switch for a short. It would be obviouse because there will be melted wires. I am leaning toword low on freon since you have already been inside the wiring/control unit.

Posted on Aug 08, 2010

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I have a heat pump model ARUF 042-00A-1A. There is only air blowing but no heat comming out. What can we do? Thanks


Heat pumps are like a refrigerator. Check the "pump" part is working properly. and is cooling one side, heating the other.

If not - maybe run out of gas (needing technical repair and refill) - or a motor fault.

Dec 27, 2010 | Goodman Heating & Cooling

1 Answer

Air condition not cooling


If this is a heat pump it sounds like the reversing valve is stuck in the heat mode, replacing it requires opening the sealed system, which needs to be done by a licensed ac repairman.

Apr 17, 2010 | Carrier 38CKC060 Air Conditioner

1 Answer

I tring to change thermosat I can not remeber what color go where


Typical Thermostat Wiring for 4 or 5 wire Heat/Cool Thermostat (not heat pumps)
4 Wire Termostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
with one transformer for both units
Rc One Side of 24 volt Transformer
Rh Jumper Rc to Rh
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
With 2 transformers one for indoor unit
And one for outdoor unit
Rc = Red One Side of (outside) 24 volt (outside transformer)
G = Green Blower (outside transformer)
Y = Yellow Cool (outside transformer)
Rh = Blue One side of (inside) 24 volt (inside transformer)
W = White Heat (inside transformer)
COOLING ONLY Thermostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
HEATING ONLY
R or Rh One Side of 24 volt Transformer
W = White Heat

Feb 09, 2010 | Heating & Cooling

1 Answer

Trying to figure out thermostat wiring diagham on a split system


Typical Thermostat Wiring for 4 or 5 wire Heat/Cool Thermostat (not heat pumps)
4 Wire Termostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
with one transformer for both units
Rc One Side of 24 volt Transformer
Rh Jumper Rc to Rh
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
With 2 transformers one for indoor unit
And one for outdoor unit
Rc = Red One Side of (outside) 24 volt (outside transformer)
G = Green Blower (outside transformer)
Y = Yellow Cool (outside transformer)
Rh = Blue One side of (inside) 24 volt (inside transformer)
W = White Heat (inside transformer)
COOLING ONLY Thermostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
HEATING ONLY
R or Rh One Side of 24 volt Transformer
W = White Heat

Jan 05, 2010 | Heating & Cooling

1 Answer

I have a RHEEM heat pump.Model# RPKA 025 JAZ. Problem- ac side works fine heat pump side unit goes into compressor lock after head pressure pegs out over 500 lbs with in 60 sec.


there is a huge problem in the reversing valve. if it works in cooling, there should be no restrictions that would cause that kind of head pressure. the reversing valve is the only thing that could cause this restriction since a/c side works. It is not repairable.

Dec 11, 2009 | Heating & Cooling

1 Answer

Heat pump problems


OPEN UNIT CHECK, SOLENOID COIL THATS CONNECTED ON THE REFRIGERANT LINE, CHECK FOR. PWR, CHECK FOR OPEN COIL, IF OK THEN PWR BOAR OR CONSOLE BOARD IS BAD

Sep 12, 2009 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

We had a new American standard furnace and A/c unit installed. A 2 ton compressor and a 2 and a half ton A coil. The unit is not cooling the charge was checked and it is ok. Unit is on and blower working...


make sure orfice used was for two ton unit and correct refridgerant also make sure that the elect auk heat is not pulled in check the psi on out door unit should be close to 225 hi side and 70 suction if heat pump switch the reversing valve man by orange stat wire to make sure shifting hope this helps

Jul 06, 2009 | Heating & Cooling

1 Answer

Heat pump


What type of furnace? strip heat....gas... I would check the reversing valve.Run the unit in cooling have someone switch the stat to call for heat....."Whooosh!!!" the reversing valve will switch over.Other methods of switching the valve , remove one wire, remove the nut and slide the solenoid off the valve will reverse. The switching solenoid can be checked magnetically by using a small screwdriver. Switch from cool to heat or heat to cool this way you can check if the valve is getting a signal .
Heat pumps are a fairly complicated simple device..... sometimes just switching the valve back and forth a couple times gets it unstuck. Remember air coming from the duct will feel cooler than air from a gas furnace .
Most customers don't think they are working when they really are. 100 degree heat is not that hot to 98.6 degree person who is used to 120 degree gas heat!

Jan 10, 2009 | Heating & Cooling

2 Answers

Hi- Can not tell if my unites are straight cool / heat or a heat pump.


if you look inside the condenser unit outside,see if you see the big reversing valve,if not it is a straight cool,heat, the heat strip ins in the air handler so you would have to take the side panel off and look for the heat stripe,my the way heat pumps also have a aux.heat stripe just in case it does not get cold enough outside,hope this helps you-mike

Oct 25, 2008 | Carrier 38CKC042 Air Conditioner

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