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Duo therm model 57915.541 A wasp nest was built on the fan while it was in storage making it out of balance. The rubber bushing was damaged. Where can I get a parts diagram to identify and the part?

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: duo therm air conditioner

my duo therm air works beautifuly all day but at night when we go to bed it seams to turn on and shut off rapidly. what could be wrong?

Posted on Jul 19, 2008

  • 400 Answers

SOURCE: Dometic Duo-Therm - 13,500 B.T.U. Model #3107541.009 - Serial # WA346967 - Yr. 1999-2000. Blower motor will not start. Replaced the start capacitor - no help. It will run by spinning the motor by hand

Yes you should try replacing the run capacitor.

Posted on May 08, 2009

  • 27 Answers

SOURCE: ac blowing breaker

The unit will draw more current when hot. Check rating of the breaker against the rating recommended by the manufacturer.

Posted on Jun 16, 2009

carlsbiz
  • 1124 Answers

SOURCE: i have a duo therm brisk air model 57915-001 leak

Could be the drain path is clogged.. Take the cover off & see if you can get it cleaned..

Posted on Jul 09, 2009

motor1258
  • 6674 Answers

SOURCE: RV ac is vibrating

Take a good look at fan blade for a crack in one or more, as well as turn unit on & watch for vibration , then take a look at mount bushings on all items. Also with fan off (obviously) check shaft for movement, side to side, up & down, in & out. Your gasket between roof should only be compressed approx half it's original thickness. Some manufacturers tighten them down too much and can be a source of vibration as well. Not expensive or hard to change. Don't forget blower wheel as well.

Posted on Jul 22, 2009

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1 Answer

I have just purchased a house with bonaire ducted cooling...can i just turn it on...its not been used i guess since last summer..


there is no reason for not being able to just it on
If there are any problems it will not cool
before you do turn it on ,check the fan in front of the outside condenser ( both sides of the blades ) for mud wasps nests as that will through out the fan balance and make a lot of noise

Nov 20, 2015 | Heating & Cooling

1 Answer

The outside part is making a clunking sound. My husband thinks the bearing has gone


if you are referring to a split system air conditioner , I would check the fan for the condenser
IT is known that if the fan has not run for some time , then mud wasps built their nests on the blades ( normally on the back side ) which causes a massive unbalance when running

Oct 08, 2015 | Heating & Cooling

1 Answer

Duo Therm Mod# 90120.001 runs but won't light


There are only three things that stop a burner from lighting (or engine from running): 1. No fuel 2. bad air/fuel mixture 3. no source of ignition.

Guess what? It's one of these three.

For starters, I actually have this furnace. First things first, make sure you have sufficient voltage to the unit. It runs on the 12 volt system, so make sure the battery is fully charged and/or you are plugged in to "shore" power and your inverter is working. If the voltage is low, the fan will run, the relays will click, but the gas valve may not open and the igniter may not have the juice to run.

At startup, you should hear relays clicking. Three times, on/off, 10 seconds apart, before the board gives up trying. If you don't hear this, probably bad board or bad hearing, but possibly bad sail switch (switch tripped by main blower air flow), relays, or gas valve actuators.

The blower will run even with the control board disconnected.

Next, check for obstructions in the inlet/exhaust, like wasp nests. Wasps LOVE hydrocarbons for some reason. Truthfully though, this shouldn't be a problem unless the nest completely obstructs the tube. This furnace has a choke which restricts the airflow to an area about the diameter of a large middle finger or a small thumb anyway. That's what the "burner air adjustment" adjusts.

If everything is clicking but it still doesn't light, you should be able to smell gas at the exhaust. If not, guess what? Probably no gas. Points to bad board, sail switch, low voltage at valve, or bad valve (unlikely).

Assuming you have gas smell, check the connection to the igniter. Heat/cool-down cycles will tend to loosen the nut. It's a .25 inch socket by the way. To get at it you need to remove the furnace from the RV.

After removal, to get the furnace out of its shroud, you only need to remove the hex screw at the center-front by the gas valve and the wiring pull-thru on the right side. Then the unit will slide out.

While you're at it, check the gas orifice for obstructions. I did this by removing the air inlet shroud, but there may be an easier way. I think you can remove the whole gas assembly instead, but removing the shroud lets you clean everything up a bit. I had mud wasps obstructing the inlet tube. The tube has a choke inside like a flattened golf ball. If you remove the tube it will fall out. It's a little tricky to get back in, but not impossible. Just line it up with a nail.

The gas jet is quite large as gas jets go. Remove the jet and clean it with brake cleaner and/or compressed air.

Check all connections, tighten as necessary. Clean and tighten ground connections, blow or vacuum away dust. Vacuum through the exhaust while you are at it.

Reassemble and spark her up on the bench.

You can McGyver a battery connection to the unit to test operation. Red to red, negative to yellow. The blue wires are for thermostat. Short them together to test operation.

This won't help much without gas, but you can at least see that the sail switch operates properly.

The sail switch controls gas flow.

You can't really test the igniter easily. It's high voltage and a pig to remove and replace. If you don't have a spare gasket, don't.

You can check voltage to gas valve. If none, it is either sail switch or board. Jump sail switch to test which.

Now the iffy bit. If the voltage is lower than 9.5 volts, the valve probably won't open. The question becomes "why." Bad ground? Bad connection somewhere? Bad input voltage? Bad board?

Check, clean and tighten connections. Clean edge connector on board - gently with cloth or pencil eraser. Try again.

This is the situation I have; there is a voltage drop at the valve (between connector and ground) of 3 volts. The furnace runs on shore power, but not on a fully-charged battery. I've ordered a new board.

If you don't understand me, or it still doesn't work, you need a licensed tech with access to parts. He should be able to bench-test unit, so just slide it out and take it to him.

Good luck!

PS: New board from http://www.dinosaurelectronics.com/ did the trick.

May 25, 2011 | Dometic Heating & Cooling

1 Answer

I have about 50 belly bung beer kegs and the wasps have built nests inside. How can I get rid of the nests so that the keg is useable for beer? We tried washing on a keg washer with caustic. Some came out...


Howdy, you can use a septic tank enzymatic cleaner to dissolve the paper of the nests. If you mean there are mud type nests you must soak them for a long while then they will rinse out. Hope this helps. Happy zymurgy:)

May 08, 2010 | Wasp 31518

1 Answer

Replacement Fan Motor


Try Johnstonesupply.com. Use the information you provided above.

May 06, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

RV ac is vibrating


Take a good look at fan blade for a crack in one or more, as well as turn unit on & watch for vibration , then take a look at mount bushings on all items. Also with fan off (obviously) check shaft for movement, side to side, up & down, in & out. Your gasket between roof should only be compressed approx half it's original thickness. Some manufacturers tighten them down too much and can be a source of vibration as well. Not expensive or hard to change. Don't forget blower wheel as well.

Jul 21, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Ac unit blowing water with air on after a few minutes


2 things to check, one is remove filters on inside & look at front coils to make sure they aren't frosting/freezing up. The other, remove cover on upper unit & check that drain holes in base are not plugged. Be careful of wasp nests when removing cover. If neither one of those is problem, you may have a cracked drain pan, which you can also observe/inspect when cover off on roof unit.

Jul 21, 2009 | Heating & Cooling

3 Answers

Duo-therm a/c


We had this issue also and dirt daubers had built a nest on the end of the fan blade

Jul 28, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

No Cold Air


Have you removed inside filters and cleaned them? have you gone up and removed the cover to see if fins are dirty, or perhaps wasps etc. Does fan only have one speed on thermostat. Does fan run faster on fan only operation? Is it tripping your breaker at all?

Jul 25, 2008 | Dometic Rooftop RV Air Conditioner

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