Question about Coleman Mach 15 Air Conditioner

1 Answer

I have a coleman roof top a/c with no wall thermostat. can i put one on it? not sure which model i have. are thre some models which a thermostat cannot be installed on?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

Yes, you can put a thermostat. Doesn't it have a cold/hot selector? The fan may still run when you turn it to warmer, but it limits how much the compressor kicks on and off. You will need to go to an electrical supply and tell them what you are doing, and whether or not they recommend you use a relay or wire into the one already in the unit.

Posted on Jul 11, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Electric furnace coleman model # 3120A751. It won't shut off on its own. Just keeps blowing hot air any ideas?

something is wrong in the 24v. make sure no wires touching each other both behind the tstat and on the circuit board in the furnace.

and obviously r to red w to white y to yellow.....

Jan 27, 2015 | Coleman Heating & Cooling

1 Answer

How do I change fan motor on my Mach 1 roof top RV A/C Model 8335D8764

Try, you should get some options, to get either their literature or tech support and they should be able to help you.

Nov 18, 2013 | Coleman Mach III Air Conditioner

1 Answer

I replaced the seal under my coleman rooftop AC unit and when I did it I tilted the AC unit on it's side while replacing the seal. After putting it back together the unit will not cool. The fan blows...

I suspect that something has shifted and is causing you trouble. If you can give me the model number off the base of roof unit, and tell me whether it's mechanical controls at ceiling or thermostat on wall would certainly help to describe proper procedure for troubleshooting. Don't give up yet, may be quite simple. First of all shut all power off to unit and go up on roof and remove the 4 screws and lift cover off. Take a look for any damage especially at top of compressor where wiring is going in. Remove the 2 nuts at top of compressor holding cap on over connections and take a look for loose or broken wires or connectors under there. If not experienced with any of this, use a pair of insulated needle nose pliers to be safe, to wiggle wires etc., otherwise please ask someone experienced with electrical.
Then if that's looking good, follow wires from compressor back to cover on side which is usually held on by a screw and remove it. You should see (if right model) some round and oval capacitors. Check to make sure none of them have shifted around and wires are touching each other or any metal around them. If you find any loose or off terminals, use pliers only and keep hands on insulated part of pliers to replace it. Let me know what you find. REMEMBER!! If your not experienced in this area, don't touch it and wait for someone who is. Capacitors store lots of voltage, even when power is off, and can be very dangerous.!!!

Jul 03, 2011 | Coleman Mach III Air Conditioner

1 Answer


Can you tell me what brand or model of thermostat it is on the wall. Most likely that is at fault, but without model, I can't tell you which wires to disconnect to verify that.

Mar 06, 2010 | Coleman Heating & Cooling

2 Answers

Coleman roof top a/c, is the heat controlled by thermostat

on the new colman units (trane) the heat is control only from the t-stat.
i will reccomand a programble t-stat for the new unit.


Nov 02, 2009 | Coleman Mach III Air Conditioner

1 Answer

My roof top Coleman Mach model 9202-876 only hums when trurned on.

Check to make sure that you are getting power to the fan motor. If you are getting power, then change the Fan Capacitor, if no power then trace the feed back to where the incoming power stops and repair that problem.

Hope this helps,


Jul 05, 2009 | Coleman Heating & Cooling

Not finding what you are looking for?
Coleman Mach 15 Air Conditioner Logo

Related Topics:

143 people viewed this question

Ask a Question

Usually answered in minutes!

Top Coleman Heating & Cooling Experts

Bill Long

Level 3 Expert

587 Answers


Level 3 Expert

2517 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Are you a Coleman Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides