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Forum
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RE: Duo Therm AC freezing up
1. They only have 1 lb of coolant, so if you had low coolant, the unit would be TOO LOW on coolant to cool . This is NOT your problem
2. IF you have a wall tstat, then your unit has a freeze sensor. If you have a freeze sensor, it CANNOT freeze unless the sensor is defective or is NOT installed in the evaporator coils.
3. IF you have manual roof top Controls, then freezing is a possibility, you need to run on HI Cool and make sure the Evap fins are clean and your Air filter/s are clean. Doug
Not meaning to argue but low refrigerant will cause freezing coils. AC works by absorbing heat. With low refrigerant ,which results in low pressure it can't absorb enough heat and the coils freeze
With 1 pound of refrigerant, any leak empties these units. Unless someone has broken the system, they are almost always either full or empty, except for the short time while they are leaking.
I'e never had one freeze up because of low refrigerant, and I've had many in because of freeze ups.
Doug is spot on, as usual.
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Chris Bryant
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06/18/13 04:23pm |
Tech Issues
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RE: Winnebago Factory Service - Now spoiled
Most dealers would be THRILLED to be able to offload warranty service on to a factory service center- save them the hassles of being lied to by the factory and nickle and dimed to death on warranty work.
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Chris Bryant
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06/18/13 06:53am |
General RVing Issues
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RE: duo therm issue
It will be fine. The small black item on top is a PTCR device, which works by getting hot (it conducts power until it heats up, which it does in a fraction of a second) The replacement will have a heavier duty PTCR installed.
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Chris Bryant
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06/17/13 08:32am |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
That board is it. The only other relay is one in the furnace, but it can only make the blower run, cannot make the burner fire, and cannot affect the air conditioner.
Worse comes to worst, you can install the electronics and thermostat from the new versions of that model for under $100. Dometic might or might not approve of that, but....
Here you go- DuoTherm control kits.
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Chris Bryant
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06/12/13 02:20pm |
Tech Issues
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RE: Dometic Fridge Won't Run on AC
A bad element will not keep it from trying to run on A.C. power, it just won't cool.
Did you actually measure the voltage across the fuse on the board? These fuses fail quite often by building up a bit of heat, and the element comes un-soldered from the end caps, so the fuse looks good, but doesn't conduct power.
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Chris Bryant
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06/12/13 11:21am |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
Well, I've had the Dometic AC Service manual online for years at http://bryantrv.com/docs2/docs/acservice.pdf- it's about #4 when you google duotherm air conditioner service manual. You could also Google Duo Therm customer support and come up with http://www.dometic.com/enus/Americas/USA/Customer-Support/.
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Chris Bryant
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06/12/13 11:14am |
Tech Issues
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RE: Atwood Water Heater Pilot Light Won't Stay Lit.
.060 mv is way too low, it should put out over 10 mv when heated.
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Chris Bryant
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06/12/13 08:43am |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
Good news bad news- the board is located in the roof unit, so you do have to get up there to access it. The circuit board is no longer available, so you have to install a new thermostat/control kit- around $100 (or individual parts for around $70). I'm not sure if Dometic approves using one of those kits in this model.
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Chris Bryant
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06/12/13 08:11am |
Tech Issues
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RE: De-Ox-It's usefulness
Thanks. I got the stuff in the needle dispenser, and it is the red bottle, not Deoxit Gold. I might try to spray it on the 30A socket, then work the plug a bit to ensure it is spread evenly, although not sure if I should do it now, or wait until fall, when I can actually use my camper without the A/C being on most of the day.
While Deoxit is great stuff, and I use it all the time, it is not magic. No amount of cleaning will cure a loose, burned outlet.
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Chris Bryant
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06/12/13 06:28am |
Tech Issues
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RE: airxcel rooftop ac unit capacitor test
It is not that easy to test a start capacitor, because most of them have bleeder resistors on them. That said- on most new models *if* they have a start capacitor, and the start circuit has failed, it will be the PTCR device which has burned up. If the start cap itself is bad, they will usually show physical signs of failure.
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Chris Bryant
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06/11/13 12:52pm |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
No problem. I am assuming yours has an air box on the interior, and is not ducted? It should be relatively easy to remove the inside plastic air director box, and I would bet that there will be a separate control box there with the circuit board in it.
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Chris Bryant
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06/11/13 11:53am |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
Well- if that is a picture of your unit, that is a heat pump- there is a reversing valve on the lower left side of the picture. Troubleshooting isn't difficult, but we need model numbers.
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Chris Bryant
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06/11/13 11:07am |
Tech Issues
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RE: Sweet Packs Malware
Did you just copy the Rescue Disk image to a CD? If so, it will not boot. Depending on the burning software you use there will be an option to burn cd image to disc.
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Chris Bryant
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06/11/13 08:55am |
Technology Corner
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
OK- that is a heat pump, not an air conditioner, which changes everything- I'll have to get a minute to look up the wiring on those.
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Chris Bryant
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06/11/13 07:52am |
Tech Issues
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RE: Norcold N841 suddenly stopped cooling last weekend
Have you tried it on electric? It doesn't take much at all for the burner to be dirty enough to not cool- most people don't have the burner cleaned every year as listed in the annual maintenance schedule.
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Chris Bryant
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06/10/13 07:13pm |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
It's on the other side under a cover that has the wiring diagram on it- possibly. The exact model and product number would help.
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Chris Bryant
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06/10/13 07:04pm |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
Yes it does- there is a single wire for the furnace which controls fan and heat. That means the thermostat is good.
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Chris Bryant
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06/10/13 04:22pm |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
It depends on the exact model- the majority of them have a control box in the air return, but some do have the circuit board in the air conditioner on the roof under the shroud.
Basically, I would start by disconnecting the W heat wire at the thermostat- if that shuts off the heat, you know it is the thermostat. Next I would move to the roof unit and do the same thing (unhook the W white wire- it should be wire nutted there. If the furnace stops, it is in the cable, if it doesn't, the board is bad. Those boards are pretty inexpensive- in the $60 range.
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Chris Bryant
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06/10/13 03:04pm |
Tech Issues
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RE: HELP!! No AC, heat stuck on full- 2000 Lance 1030
On that model everything is controlled by the roof unit. There are 6 wires running from the thermostat to the roof unit. The thermostat controls the roof unit by grounding the leads- IOW, white is the furnace lead, so ground the white wire will activate the furnace relay in the roof unit. Tan is fan, blue is high fan and yellow is cool (compressor).
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Chris Bryant
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06/10/13 02:21pm |
Tech Issues
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RE: need help finding a small radio that can plug into my laptop
Not cheap, but it looks like this C Crane radio would fit the bill. I'm not positive about the usb charging, but the charging cradle accessory says "so you can charge without a computer". It's really an mp3 player/recorder with built in AM/FM radio.
C Crane has a bunch of other models...
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Chris Bryant
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06/10/13 11:50am |
Technology Corner
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