Question about Coleman Air Conditioners

Open Question

1987 COLEMAN MACH 3, A/C ONLY

When I plug in my camper the a/c comes on by itself, and goes off after running for 3 to 5 minutes. It will do this cycle as long as it is plugged in. If I push up on the selector knob ( fan, a/c, ect ) it will go off as long as I hold it. As soon as I let go it comes back on. I turned the thermostat so that the compressor won't come on, but it keeps doing the cycle. It started doing this about 3 weeks ago.

I need some help!
Ken Louviere
klouviere@aeroframe.com

Posted by on

6 Suggested Answers

Master_Tech
  • 770 Answers

SOURCE: COLEMAN TSR MACH 3 COMPRESSOR

I would check the thermostat based on what you said it could be out of calibration

Posted on Jun 11, 2008

  • 54 Answers

SOURCE: coleman tsr mach 3 RV Air Conditioner

I don't think you need a new one just a good cleaning and service. The unit has a liquid high temperature line near the compressor with a fan blowing outside air across it this coil gets clogged over time with air-borne dirt and pollen and leaves and such and must be cleaned regularly or the unit will be unable to remove the heat from the coil and during the peak demand (3pm) the circuits that protect the compressor and the trailer wiring from being overloaded and burning or melting will trip. From what you have described it sounds like the RV is working as it should with a condenser coil that needs to be cleaned. GL and happy camping!
P.S. I've only serviced the occasional RV unit but in those cases I laid a piece of plywood on top of the Rv for work platform removed the retaining screws from the top cover and used a spray bottle with a good heavy foaming cleaner a shop-vac and a brush to get the job done.

Posted on Jun 11, 2008

SOURCE: Coleman Mach 3 Rv air conditioning

Dirty coils might be your problem. You might have a refrigerant problem as well. Try cleaning it first then have a tech put gages on it. Doesn't sound too serious

Posted on Jun 12, 2008

  • 577 Answers

SOURCE: coleman mach wire schematics?

COLEMAN R.V. AIR CONDITIONER SERVICE AND REPAIR QUESTIONS
COLEMAN R.V. PRODUCTS
GO TO
www.rvcomfort.com

Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

Posted on May 11, 2009

  • 127 Answers

SOURCE: coleman mach air conditioner in rv tries to start

“The voltage could be low – ”
a) Check the voltage between #1 on the
overload switch and the “R” terminal of the
compressor while it is not humming. This
voltage must be 115 volts domestic USA
models or 240 volts export/overseas models.
No less than minus 10% is allowable.
b) Check the voltage from “C” or “R” of the
compressor while it is humming (trying to
start). The latter reading will probably be
lower, but it still must be 103.5 volts
minimum domestic USA or 216 volts
minimum export/overseas models.
If the first reading is above 103.5V domestic USA and
the second is under 103.5V domestic USA, there is
too much voltage drop in the lines - a situation which
must be corrected for the air conditioner to perform
safely and satisfactorily.
2. “A capacitor could be shorted, weak or open.”
Turn the power off.
Caution – There is always a chance that a capacitor is
holding a residual charge, so before touching a
terminal, discharge the capacitor as explained earlier
in this booklet.
Remove capacitors, visually examine them and test
them per instructions given in earlier section on
capacitor testing (See page 9).
If the capacitors test OK, replace them and carefully
reconnect the wires. Be sure the wires are connected
to the right terminals.
3. “Start relay contacts could be open – ” if so equipped.
Turn off all power, then check for continuity with
ohm meter between terminals 1 & 2.
4. “Compressor start winding could be open or
grounded.”
Check compressor windings per instructions. See the
section on the compressors (See page 8).
5. “Compressor could be mechanically stuck.”
This very rarely occurs and when it does, it is usually
after a lengthy shutdown. This should be considered
only after all the above possible causes have been
positively eliminated. To free a stuck compressor, use
your hermetic analyzer according to the
manufacturers instructions.

Posted on Jun 30, 2009

  • 127 Answers

SOURCE: We have a 2000 Coleman Cheyenne pop up with a

The distance of the cord is a big deal, 10AWG Cord would be best for this situation. If you have a 50ft cord, make sure that the cord is not wound up on top itself as this can cause a drop in voltage and a spike in amperage. Is the compressor trying to come on at all? If not, then you may have a problem with the selector switch or the thermostat. If the compressor is humming for a few seconds and then stopping and then trying to come on again, it could be a problem with voltage loss. Anything below 98.5 plus or minus 10% is too low the for the compressor to kick on.


Posted on Jul 04, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Thermostat


If this is a park model trailer like mine, there is a transformer in what they call the ceiling package. It is mounted up inside the return air plenum.

Jul 31, 2013 | Coleman Mach III Air Conditioner

1 Answer

I installed a new colman mack thermostat in my camper witch has a colman ac unit now ac unit runs 5 min then shuts off for 3 min then starts again and keeps doing this . so I by past thermostat and it will...


if it is a programmable thermostat you can unhook thermostat and when it comes on select 3 instead of 1. As it sounds as though it is short cycling this happens in older houses with drafts. Hope this helps Tim

Sep 07, 2010 | Coleman Mach III Air Conditioner

1 Answer

Model coleman mach 8333c8714 serie 8000 my a/c start for 2-3 minutes and than the a/c shut down but the fan still working!! after a few minutes , it want to start again but dont seem to be able to. you can...


COLEMAN R.V. AIR CONDITIONER SERVICE AND REPAIR QUESTIONS
COLEMAN R.V. PRODUCTS
GO TO rvcomfort.com
Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

Jun 15, 2010 | Coleman Mach III Air Conditioner

1 Answer

COLEMAN MACH 3 MOUNTING ON INSIDE OF CAMPER NOT ALIGNING WITH MY


Did you purchase a new Ducted Ceiling Unit with the Upper Unit air conditioner? If you are replacing an older mach 3, the ducted ceiling packs are not compatible and you will need to purchase the ceiling pack as well. The ducted ceiling pack part number for the 8333 series Mach III AC is below.

1. Heat/Cool Air Distribution Box - 8330B735
2. Cool only ADB - 8330A733
3. Wall Thermostat (if needed) - 7330G3351

Hope this helps.

Jul 01, 2009 | Coleman Air Conditioners

1 Answer

We have a 2000 Coleman Cheyenne pop up with a Coleman mach roof unit. We turned it on today at home and the fan blows but the heater doesn't heat up and the air conditioner doesn't cool. Someone said if...


The distance of the cord is a big deal, 10AWG Cord would be best for this situation. If you have a 50ft cord, make sure that the cord is not wound up on top itself as this can cause a drop in voltage and a spike in amperage. Is the compressor trying to come on at all? If not, then you may have a problem with the selector switch or the thermostat. If the compressor is humming for a few seconds and then stopping and then trying to come on again, it could be a problem with voltage loss. Anything below 98.5 plus or minus 10% is too low the for the compressor to kick on.


Jun 06, 2009 | Coleman Mach 15 Air Conditioner

1 Answer

Coleman Mach 3 Rv air conditioning


Dirty coils might be your problem. You might have a refrigerant problem as well. Try cleaning it first then have a tech put gages on it. Doesn't sound too serious

Jun 12, 2008 | Air Conditioners

1 Answer

COLEMAN TSR MACH 3 COMPRESSOR


I would check the thermostat based on what you said it could be out of calibration

Jun 11, 2008 | Coleman Mach 15 Air Conditioner

2 Answers

Coleman tsr mach 3 RV Air Conditioner


I don't think you need a new one just a good cleaning and service. The unit has a liquid high temperature line near the compressor with a fan blowing outside air across it this coil gets clogged over time with air-borne dirt and pollen and leaves and such and must be cleaned regularly or the unit will be unable to remove the heat from the coil and during the peak demand (3pm) the circuits that protect the compressor and the trailer wiring from being overloaded and burning or melting will trip. From what you have described it sounds like the RV is working as it should with a condenser coil that needs to be cleaned. GL and happy camping!
P.S. I've only serviced the occasional RV unit but in those cases I laid a piece of plywood on top of the Rv for work platform removed the retaining screws from the top cover and used a spray bottle with a good heavy foaming cleaner a shop-vac and a brush to get the job done.

Jun 11, 2008 | Air Conditioners

Not finding what you are looking for?
Air Conditioners Logo

Related Topics:

42 people viewed this question

Ask a Question

Usually answered in minutes!

Top Coleman Air Conditioners Experts

D. E. Hev

Level 3 Expert

1059 Answers

Dennis Key
Dennis Key

Level 3 Expert

2444 Answers

Cindy Wells

Level 3 Expert

4759 Answers

Are you a Coleman Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...