Question about Coleman Mach III Air Conditioner

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Not getting any cool air

I would like to know, if I can add freeon to this unit, as I am not getting any cool air. Or do I have to get a new unit , otherwise this unit work's good

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  • inicis May 11, 2010

    What type of a/c is it? Central air, window unit, automobile?

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  • 127 Answers

Unit works good? Is the compressor coming on but not blowing cold air? If the compressor is running but not cooling, then the main issue is usually with cleanliness of the condenser. Wash it out if this is the case. If the compressor is not coming on, multiple problems could be the reason.

These units do not have service ports as a normal AC does. If you have lost freon then there is a leak in the system somewhere as they are sealed. The process for recharging a rooftop unit is usually expensive and not fail safe. I would recommend a new unit if a leak is discovered.

Posted on Jul 02, 2009

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1 Answer

How do I add freeon to the unit


Hi,
Here is a tip that I wrote about how to add refrigerant to a air conditioner orcooling system

How to add Freon to a Air Conditioner or Refrigeration System

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Hi, first you will need to know, what type refrigerant,(freon) your a/c used, if you need to add freon, there's a leak in your a/c. you will have to find and repair leak, before you can charge/ add refrigerant(freon) . automobile a/c can be easily recharge (add) to system, but your window a/c unit, has the same principles but different approach, if you don't have experience, you will have to call mechanic, make sure you have a freon leak, before calling mechanic, plug a/c on let it work, put hands close to a/c, feel or check temperature of air blowing out from a/c, make sure compressor is working/running, fans could be working/ but compressor not, also put a/c thermostat to max, your model no. GWHD5000. means your unit is 5000 b.t.u, (british thermal unit) measurement of heat transfer, am wondering if a/c is to small for your space/room. making you think it needs freon, 5000. b.t.u. is for a small space,like a room 10' by 10' like a storage area or small bedroom, keep bedroom door/windows shut. measure you room/space/area , the bigger space/area needed to be cooled, has a chart, maybe you can find it on internet, any way a 10.000 or 12.000 b.t.u a/c is better buy, for normal room/space etc. so check compressor especially to make sure working, a/c could be to small for space/room, check it at night to see if it's colder. don't try to put gas/ freon yourself, could be very dangerous. but before calling mechanic, check those thing, mention before, could be your a/c are to small, for space/room etc. remember before attempting any repairs, disconnect power. good luck.

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1 Answer

The compressure kicks on, amd the blower works and it let me put the freeon in it once and thats all it let me know it dont work kno more when i add freeon? and it blows hot air


you need to have a repair shop do a leak check/test since you r losing freon somewhere if you have to keep adding it. Once it all leaks out it allows air to enter and air IS NOT a good thing for a/c systems. They run under an initial 30 inches of vacuum for freon charging.

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1 Answer

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Hello. If your outdoor coils are dirty it's a good chance the indoor coils are dirty also. Clean the indoor coils and flush out the condensate line.
I know it's tempting to feel the air and try to decide if the unit is working properly but, you need to use a thermometer and while the unit is running check the temperature at the return air vent and then check the temperature at the supply vent closest to the unit. Remember to let the thermometer set for about 5 minutes before reading.
You should be looking for about 15 degrees F cooling between the return and supply.
If your coils are clean make sure the outdoor fan is operating properly. The air coming out of the outdoor fan should feel warm, almost hot. If not you may need to check your pressures. Good luck and let me know what you find.

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1 Answer

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Hi! AC Unit
Sorry you have had so much trouble. Sounds like with the factory warranty being in effect the whole outside condensing unit should be replaced. With this type of problem there could be some blockage in the AC lines. With out some pressure reading it is hard to tell if the expansion tube is plugged, or there is some other major problem. If your service tech is unable to diagnose the problem you may need to get a third opinion. Goodman may have a factory representative in your area. You may be able to find some help with a different dealer or online. Good Luck! I will try and look for any changes.
InMrFxIt

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