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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: robertglines1 on July 29, 2011, 08:07:26 AM

Title: Roof top ac in tooter home iceing over.
Post by: robertglines1 on July 29, 2011, 08:07:26 AM
Fan on high.   Very humid.   filter clean. coil clean. ?????   Bob   tried search engine :-\
Title: Re: Roof top ac in tooter home iceing over.
Post by: TomC on July 29, 2011, 08:09:42 AM
Could be a bit low on freon.  Try to set the thermostat higher-then gradually lower the temp down to what you want.  Good Luck, TomC
Title: Re: Roof top ac in tooter home iceing over.
Post by: robertglines1 on July 29, 2011, 08:18:21 AM
Will ck when we get it home. Now Andy will just have to move in bus with us.Will try thermostat remedy.         thanks
Title: Re: Roof top ac in tooter home iceing over.
Post by: papatony on July 29, 2011, 11:13:08 AM
Robert  you are low on freon, you will have to let it thaw out before you can recharge it .  uses R-22 same As house freon.
Title: Re: Roof top ac in tooter home iceing over.
Post by: larryh on July 29, 2011, 11:54:41 AM
How can you add freon mine has no connections for hoses to attach
Title: Re: Roof top ac in tooter home iceing over.
Post by: robertglines1 on July 29, 2011, 12:01:47 PM
In  this case it has a service valve (schrader) soldered into line. Has been serviced before we got it; will look for leak and ck from there.  to install you drill 1/8 inch hole in side line and  silver solder assembly in place. This gives you future access to system to pump down etc.
Title: Re: Roof top ac in tooter home iceing over.
Post by: Zeroclearance on July 29, 2011, 01:14:26 PM
Robert from what I have read, icing can be from restricted airflow or dirty core.  The last thing to check is the freon charge.   
Title: Re: Roof top ac in tooter home iceing over.
Post by: demodriver on July 29, 2011, 03:48:19 PM
Some regular degreaser solevant works good to clean them if that is the case. I would bet that the coolant level is low like others have said.

Make sneak into a car wash with the unit and give her a good bath. ;D


Where abouts are you Bob?
Title: Re: Roof top ac in tooter home iceing over.
Post by: robertglines1 on July 29, 2011, 06:11:29 PM
Vandburg co Fair---where I met you  Eric
Title: Re: Roof top ac in tooter home iceing over.
Post by: demodriver on July 29, 2011, 06:35:24 PM
Ya I thought about that after I looked on the derby forum and they was talking about the fair derby there.

Eric
Title: Re: Roof top ac in tooter home iceing over.
Post by: Barn Owl on July 29, 2011, 09:26:37 PM
Quote from: larryh on July 29, 2011, 11:54:41 AM
How can you add freon mine has no connections for hoses to attach

When I took possession of my bus one A/C was too low to even start. I added a refrigerant line tap valve, and using the manufacture's recommended pressure I recharged it. The tap valve was supposed to be a quick and temporary fix just to see if the A/C would work, but five years later it is still working great. For less than $20 it sure beats having to solder in a valve and pulling a vacuum etc.

Linky: Refrigerant Line Tap Valve (http://www.globalindustrial.com/g/hvac/parts/ac_accessories/Supco-Acces-Valves)
Title: Re: Roof top ac in tooter home iceing over.
Post by: JohnEd on July 30, 2011, 12:47:40 AM
OOOOOWWWWW!   Thank you Barn Owl.  No telling how many tens of thousands of repair money you saved the board with that one.  Really.....great!

Thanks,

John
Title: Re: Roof top ac in tooter home iceing over.
Post by: luvrbus on July 30, 2011, 10:46:26 AM
If your thermostat sensor has been relocated on the unit they will freeze because they lose their cycling feature first thing I check

good luck