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 > Dometic AC unit

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ajriding

st clair

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Joined: 12/28/2004

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Posted: 03/29/20 05:15pm Link  |  Quote  |  Print  |  Notify Moderator

Thermocouple is the bare copper wire (tube) with the big end (about pencil thickness) and is a thermometer for the AC to measure incoming air. Just to clarify if any readers wonder.

If you have issues and want to fix, then really try the suggestions. There will be no real answer, that was kidding, all answers are possible to be your issue or not. If you do not try to solve, then it wont fix itself.

Even professional auto mechanics try suggestions. They start with the easy thing, charge you, then move on to more and more complex and expensive things to see if it will work, all the while charging you for their attempts. If you can do it yourself for free then saves money. Process of elimination. You have to try the fixes known to cause issues.

TomG2

Central Illinois

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Posted: 03/29/20 06:30pm Link  |  Quote  |  Print  |  Notify Moderator

ajriding wrote:

Thermocouple is the bare copper wire (tube) with the big end (about pencil thickness) and is a thermometer for the AC to measure incoming air. .
y

Why not call it a thermometer? Thermocouples are usually used as safety devices to control gas flow.

I have tried all the suggestions and many more.

smthbros

WI

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Joined: 02/15/2004

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Posted: 03/30/20 10:49am Link  |  Quote  |  Print  |  Notify Moderator

A thermocouple is a device which generates electricity when subjected to a flame, most often from a pilot light.It is unlikely to be found on an rv air conditioner.
The device mentioned in previous posts would likely be a thermister, which is a resistor whose resistance varies with the temperature it is subjected to. This may be found lodged into the evaporator coil of the air conditioner. Its purpose is to turn off the compressor when the condensation on the evaporator begins to freeze.

philh

Belleville MI

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Posted: 03/31/20 04:55pm Link  |  Quote  |  Print  |  Notify Moderator

ok, the pointy copper thingy.

On my unit it was tucked in behind the air flow. I moved it into the airflow and my short cycling went away. I froze my wife out, it was working that much better. Such a simple fix.

ajriding

st clair

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Posted: 04/01/20 08:35am Link  |  Quote  |  Print  |  Notify Moderator

thermocouple
agree. I didnt want to disagree.
The thermometer is still the copper wire that is flexible and should sit in the flow of return air. If this is tucked away, or touching something with a different temp then issue arise. Easy to check this by taking ceiling assembly off (maybe just the air filter screen) and bending it into position. -easy to do, and always start with the easy suggestions first...

CavemanCharlie

Storden,MN

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Posted: 04/03/20 04:12pm Link  |  Quote  |  Print  |  Notify Moderator

philh wrote:

ok, the pointy copper thingy.

On my unit it was tucked in behind the air flow. I moved it into the airflow and my short cycling went away. I froze my wife out, it was working that much better. Such a simple fix.


I like this name the best.

I've had to do the same thing on a Window Air Conditioner once.

TomG2

Central Illinois

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Posted: 04/04/20 01:30pm Link  |  Quote  |  Print  |  Notify Moderator

ajriding wrote:

TomG2. Now that you have tried all the above suggestions, just let us know you have, and then we will offer the real answer. There can be only one answer. No one has ever had an issue and solved it by other means.


Problem solved. New trailer has Coleman Mach AC. No problems. No "false starts". No short cycling. You can keep your secret answer.

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