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I have a coleman heat pump that is about 22 years old and never had a problem. but now my heat strips at times, start to operate at the same time the unit is cooling. thinks for any help

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I had a similar problem in an old Coleman heat pump. In cooling mode it would put out heat instead
of cool air. The problem was on the relay board in the outside unit. There was arcing between pins
which caused the reversing valve to operate so it operated as a heat pump. My solution was to
remove the relay board and remove any copper traces that carried 240 volts and solder wires to the
remaining trace and make external connections to the wires that went to those pins so that the pins
on the board connector were no longer used. This solved the problem for me but would take some-
one with knowledge of electronics to do the work. Above all, be sure to turn off all power before any
work is done in the outside unit. The pins involved were the four on the left edge of the board when
viewed from the outside of the unit if my memory is correct.

Posted on Mar 31, 2009

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I would check the control wiring. At some point two bear wires are touching. When the cooling mode is energized it is causing the heat relay to also pull in. Check for visible damage to insulation at any point where two wires can make contact with each other.

Posted on May 25, 2008

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Posted on Jan 02, 2017

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HI-i have a coleman heat pump- on defrost it gives cold air- not normal. thanks


Do you have electric heat strips for auxillary or backup heat? When the heatpump goes into defrost, the electric heat strips or whatever your source of auxillary heat is, should come on to keep you from feeling the cold air. When the heat pump is in defrost it is essentially operating in the A/C mode, that is why you will feel cold air if the auxillary heat isn't working. You need find out why the auxillary heat isn't coming on if it isn't. It could be do to a bad seqencer or a burnt out element.

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Working on a coleman 3ton split unit in a mobile home, when thermostat calls for heat, the heat strips come on and blower comes on. heat strips go off before the thermostat is satisfied and the blower...


Probably a bad limit switch on the strips or the heat sequencer/relay is falling out after continued amp draw. I would lean toward the heat relay/sequencer. Havent heard of any problems with coleman limit switches. These units were prone to get water inthe electrical compartments due to the evap coil being right above it. Check to see where the power break is starting at the strips and working backwards throught the circuit. That will tell you for sure. Make sure you have 24v going to the heat sequencer too.

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Hello,George TIPS?I assume you are looking at the elements as they run.A 4 ton drive can keep active heat strips from glowing.What is your heat rise split.Meaning in/supply out/return temps?W1&W2 sequencer time delays can be up to 3 minutes.Take a AMP reading on 1 heat element supply wire with a volt meter.You can jump W1&W2 at the board for testing.

Apr 23, 2010 | Coleman Heating & Cooling

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Is it possible to find parts for old Coleman floor furnaces? I have a 35,000 BTU, Colman Super Performance gas furnace model 22. It's old but operates great. My concern is on the cracked glass in a...


Dear Sir,
That glass inspection cap is not made anymore, and it is very dangerous to operate with out one in place. Many people are in the same spot as you are.
I have had success working with glass companies, they can make a glass piece out of glass that can withstand high heat, it is time consuming and expensive, so you will have to shop around, but it can be done, but not for cheap.
Those old floor furnaces can heat so nice, Just for the information these floor furnaces are still being made, though they heat a bit differently as they don't get as hot, just a new code put into place, to keep children from burning thier little feet.
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1 Answer

Problem, no heat


The fuse is a 110 volt breaker in your service panel. If your heat comes from the heat strip it is inside of the ac in front of the evaporator. If it is a heat pump thats the the compressor. To create heat the compressor runs in reverse. There is a directional relay operated by the circuit board and thermostat to tell the ac what you are calling for, heat or ac. The heat strip is connected to the circuit board and is also operated on 110 volts. You have one of three problems. Breaker tripped, bad heat strip, bad circuit board. Possibilities, find the heat strip cable and unplug and plug it back in a few times,maybe lost connection. That happens at times because of the warm and cold elimates. The heat strip can be tested by takeing it out and bench testing it with 110 power. circuit board can be checked by use of a volt meter, turn the ac to heat and check the pins where the heat strip plugs in. To chech the heat pump you must go up top, remove ac cover and with an amp clamp find the wires going to the compressor and put the amp clamp on one wire only. Amps should be no more than 7 amps. If it is the compressor is shot. If there is no reading then the compressor is not running. Now you may have a bad capacitor which is up top under a sheet metal cover. They also can be tested with a VOM. You will find 2 or 3 capacitors depending on model. Run and start. Capacitors typically are charged with 370 to 600 Volts. They will knock off the top of your camper. BE AWARE OF THE FACT YOU ARE DEALING WITH 110 VOLTS. IF YOU ARE NOT FAMILIAR OR COMFORTABLE GET SOME QUALIFIED HELP. GOOD LUCK

Mar 14, 2009 | Coleman Mach III Air Conditioner

1 Answer

When I turn the air on the heat strips comes on at the same time


Is this a central heat? From the size i assume it is.
You say air conditioning on part of your question then use heat pump on another part. So it is important for us both be on the same page.
With all due respect some people think they have a heat pump and it is just AC and electric heat also but is not a heat pump.
. If you have the outdoor AC unit running with your thermostat set for heat and the air coming off the out door unit is cold, or you see it "steam up outdoors" off the out door unit at times (we call this mode defrost).

If you actually have a Heat pump system some times it is wired to have the strips come on at the same time the heat pump comes on especially if you experience a lot of weather below 40' occasionally and have an emergency heat setting on your thermostat you most likely have a heat pump.

If you have a heat pump for sure now the heaters can come on with the outdoor section if
1 they are wired to do so or
2 the thermostat has 2 stage heating and the second stage is telling the elements to come on, or
3 the outdoor thermostat (if so equipped) is telling the elements to come on.
Any 1 or combination of these 3 items can cause the elements to come on wit the out door unit.

Mar 12, 2009 | Coleman Heating & Cooling

1 Answer

I have a 3 ton Coleman heat and air pump and when I turn the air condition on the heat strip comes on at the same time


If you are calling for heat and the thermostat is set for 2 degrees higher than room temp, the heat pump and strips come on.
When the room temp and stat temp are less than 2 degrees the strips turn off.
That is, unless the installer wired the t-stat for the strips to stay on.
If they are coming on in the air/cool mode then you have a bad heat relay or a t-stat wire shorted.

Mar 11, 2009 | Coleman Heating & Cooling

2 Answers

Cold air out of register for about 3 min. until starting to warm


heat pumps generate heat from compressing freon and take a while to generate enough heat to be useful. never expect robust heat from a pump like an oil burner or a gas furnace, but they do heat great and are cheaper to operate. do this . if you are still using an old mercury bulb stat change it to a digital one. this will hold an exact temperature and time off between cycles will be less and the indoor coil will stay warm between short cycles, with an old mercurry stat you set it at 70 and it may run up to 73 and stay off till 68. thats a long off cycle and when call resumes the coil has gotten cold and has to start all over again. also dont wait till it gets cold to run a heat pump. turning it on and off as it gets cold is not correct. you should select a temp ,usually 71 for heat and set it and leave it on to do its thing.you may want to check the charge. hot gas discharge is usually 100 degreees hotter than outdoor temps after 15 minutes run time. for example if its 40 outside the big freon line outside thats insulated should be about 140 degrees. or you can run it 15 minutes and grab it with your hand . it should be almost uncomfortable to hold any length of time. careful some get quite hot. you also have the option of hooking up the electric strip to automatically come on if you push the stat up 2 degrees hotter than the temp in the room. that way you get heat pump and strips till temp gets within 2 degrees of set point and the strips shut off and pump maintains.good luck

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