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Coleman tsr roof ac does not cool 27' rv i've cleaned the filters & every once in awile it drips water from one side of ac.it blows cold air but it does not reach the back of rv

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  • Bruce Hathcock May 11, 2010

    look for blockage from wasps nest have found several units that were blocked by them.

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Is this a new unit/RV by any chance?

Posted on Jul 23, 2009

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Why is air conditioner freezing up


Hi Krystal. Not sure how old your AC is. But mine is 1988 Class C. My roof mount started today freezing up After being on only 1/2 hour or less.I took the cover off AC on roof and seen the cooling coil half full of ice building up. When It get fully packed with ice the inside air cannot pass thru coil to fan to recycle the cooled air back down inside RV.. I checked out this site.Fixya.It seems my AC may be blocked with dust in the cooling coil. So I cleaned it out with compressed air. You can buy a can of it in spray form at Wal-Mart.$5..Also FixYa suggested to change the air filters after you clean the coils. Take off cover in inside on ceiling and put new filters. Peferable ones that are able to breathe thru easly. Mine was pluged with dog dander and a bit of dog hair.. I may have to put my dog..in a bag...No I can't do that... But today and yesteday it was very hot and ******* the AC.. But I did attach a small fan under my AC to push more hot up into coils.. It did make a diference The coils started to thaw and drip water on roof.. But I still have to check freon pressure...I'm attaching a photo of my small fan It is only 5"across...Hoped that helped a little.......John, Cornwall, Ontario
7_7_2012_10_38_25_pm.jpg7_7_2012_10_39_02_pm.jpg7_7_2012_10_40_14_pm.jpg

Jul 03, 2012 | Coleman Mach 15 Air Conditioner

1 Answer

I have a travel trailer with a coleman 7300 roof top ac unit. the unit will blow cold air but water leaks thru the plenum. i was told by the previous owner that it needs a new seal. i would like to fix it...


If it's leaking inside where filter cover is, then real good chance the drains being plugged is the only problem. If water (condensation) not running off roof when operating in cool mode, then I'd bet drains, which are located under unit on roof, and you should see them sticking down like buttons. They have a hole in side that needs cleaning with a pipe cleaner or similar to open them up. If need be, shut off power to unit and remove top cover on roof unit and look for the drain holes in base, and clean them out. If water comes in while raining, but AC not running, then it's gasket. That is remedied by removing ceiling assembly (just screws) and 4 bolts that pull/hold the upper and lower assemblies together, unplug wiring to upper unit, and simply lift it off, change gasket and re-install. Tighten those 4 bolts equally when gasket is aligned properly over hole, only until gasket is approx 1/2, original thickness. Plug harness back in and your done. (about an hours work.) Only other thing that may be wrong is styrofoam drip tray for cooling unit, under cover on roof may have a crack , allowing condensation to leak in. If that 's the case, you can try to find a sealant compatible with styrofoam to seal those cracks.

Nov 14, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a coleman Mach rooftop unit & want to connect drain tubing to carry condensate away. Is there a small drip pan with a tubing conncetion for this?


If all you want to do is re-route condensation dripping off the roof, and it's a rubber roof, one easy way is to buy a caulking tube of "Dicor" self leveling sealant for rubber roofs from RV dealer, and run a 1/4"-3/8" bead across roof from AC to wherever you want it to go, and let it cure for a couple of hours. Nobody sees it, and a tube is about $10 max.

Jun 09, 2010 | Coleman Mach III Air Conditioner

1 Answer

Coleman mach 3 rv roof mount ac


You will need 12 vdc (battery or converter) for controls to work, and 115 VAC (hydro) for fan & compressor to work. With your fan obviously working, that tells me you have both already but compressor may not be kicking in. Do you hear a "moaning" sound or see lights dim when switched to cool?

Aug 17, 2009 | Coleman Mach III Air Conditioner

1 Answer

Where are the drainage hoses located on a 2005 coleman rv ac


many times the pan of the evaporator in intergral with the drainage. You need to pull the cover and see which way the pan is pitched you should be able to trace it that way.

Jul 12, 2009 | Coleman Mach 15 Air Conditioner

2 Answers

Drain for a colelam rv air conditioer


It is entirely possible that a five minute test would not produce any noticeable amount of water. Turn off everything in the house that is using electricity and your 20 AMP service will be sufficient to run your AC.

Jul 06, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Coleman tsr rv air conditioner leaks into rv when running


It probably has a clogged condensate drain. Take off the cover on top the RV and check hoses or tubes leaving unit for debris or lint. Often this water is used to help cool the condenser so look for leaves pine needles etc in the pan. There may be a cover you can remove on the evaporator section that will allow you to clean the collection pan and hose or trough. Is it possible the RV is far enough out of level that the condensate can't "run uphill"? Always power off while working on this unit unless you are electric savvy. Good luck!

Jun 28, 2009 | Coleman Mach 15 Air Conditioner

1 Answer

I have a 1986 RV with the orginal Rooftop AC made


Some can is correct generally not worth the effort

New they are around $ 500 and you won't worry about leaks

Jun 03, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Recycling to soon?


sounds like the unit is low on freon. it will need to be serviced so the leak can be fixed then recharged.

Jun 01, 2009 | Coleman Mach III Air Conditioner

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vulcan bonaire comfort control External natural gas electronic ignition 2004. ISSUE: Fan blowing only cool air continuously. Forced to kill power to stop it. model is one of the following. MB514E,20E or 30E. Going by mech drawing parts list. i can confirm what type of sensors i have cleaned with very fine sandpaper. flame sensor PN 5441603SP and IGNITER ELECTRODE PN 5441602SP The fault code i see is described as the following. There are x4 LED's. Sequence Left to Right. LEGEND: 1 Flame Sensor 2 Pressure switch 3 OverTemp 4 Diag. R Red G Green S Solid Colour B Blinking LED Behaviour. In order 2RS & 4GS Until i hear ignition. 2RS & 3RB Duration: split second 2RB,3RS & 4GB Duration: split second 3RS & 4GB Duration: Until it has completed blinking x4 times. 3RS Duration 4 seconds Repeat last two mentioned behaviour. in my own opinion, as a safety feature, the unit thinks that it has overheated or is about to. so kills the gas and force feeding cool air to heating components to save it from frying. Does this mean i have fault 04 if so does this mean i may have a faulty igniter or flame sensor or maybe a faulty as described in the mech drawing SWITCH OVER TEMPERATURE 120 degrees celsius. Am i correct here? Is this the over temperature cut out switch? if no one can really pinpoint which part requires replacement, can you at least, in sequence advise which parts to purchase? so then ill just try my luck. i wonder how to properly test if flame sensor, igniter, over temp etc is faulty with a multimeter. do i just perform a continuity test. I wonder what other parts can i test related to this fault im getting.

Jul 22, 2018 | Vulcan Heating & Cooling

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