Re: Air Conditioning Problems

[Guest guest]

Mr. ,

Contact the manufacturer of the ambulance box ( i.e., wheeled coach,

AEV, etc.) I'm not 100% sure, but I believe the MAV style ambulances have

separate a/c systems for the cab and patient compartment. If this is the

case, the cab system could be low on freon or have a more serious problem.

If there is one system for both, you could have a faulty valve in your a/c

compressor. I hope this helps you.

W. EMT-I

[Guest guest]

Check the Orifice tube on the Front A/C

Air Conditioning Problems

I have a 1999 model Freightliner " MAV " ambulance manufactured by Wheeled

Coach. The A/C in the back is cold, but the one in the front is not. Is my

truck unique or are others having similar problems? I have contacted

Freightliner for assistance, but haven't received any, as of yet.

Any help would be appreciated.

Tom , Director of EMS

Graham Regional Medical Center

1301 Montgomery Road

Graham, Texas 76450

twright@...

[Guest guest]

Tom,

Is it a single compressor system or did Wheeled Coach add another, if it is a

single compressor system Glenn is right, I would check the orfice, or in some

cases like International an expansion valve, if you see some debris you may be

losing the compressor. If not, try replacing the orfice-expansion valve and the

front dryer. Your rear dryer may be catching the debris enough to keep it cool

for a while, but it won't be long....

Switzer

Fleet Manager

ETMC EMS

>>> rev@... 07/11/02 09:13AM >>>

Tom I believe our certified AC technician can repair your problem. We have

repaired a large number of specialized 12 volt AC systems. If you would to

schedule your unit for service please give me a call at 1-800-460-VALU.

Sincerely,

Glenn Pratt President

Reliable Emergency Vehicles, Inc.

Air Conditioning Problems

>

>

> I have a 1999 model Freightliner " MAV " ambulance manufactured by Wheeled

> Coach. The A/C in the back is cold, but the one in the front is not.

Is my

> truck unique or are others having similar problems? I have contacted

> Freightliner for assistance, but haven't received any, as of yet.

>

> Any help would be appreciated.

>

> Tom , Director of EMS

> Graham Regional Medical Center

> 1301 Montgomery Road

> Graham, Texas 76450

>

>

>

> twright@...

>

>

>

>

[Guest guest]

Tom I believe our certified AC technician can repair your problem. We have

repaired a large number of specialized 12 volt AC systems. If you would to

schedule your unit for service please give me a call at 1-800-460-VALU.

Sincerely,

Glenn Pratt President

Reliable Emergency Vehicles, Inc.

Air Conditioning Problems

>

>

> I have a 1999 model Freightliner " MAV " ambulance manufactured by Wheeled

> Coach. The A/C in the back is cold, but the one in the front is not.

Is my

> truck unique or are others having similar problems? I have contacted

> Freightliner for assistance, but haven't received any, as of yet.

>

> Any help would be appreciated.

>

> Tom , Director of EMS

> Graham Regional Medical Center

> 1301 Montgomery Road

> Graham, Texas 76450

>

>

>

> twright@...

>

>

>

>

[Guest guest]

Does your unit have separate a/c systems? One for the box and one for the

cab? Troubleshooting a/c systems can be tricky at best. If the a/c

compressor under the hood does not engage when the a/c is turned on, you

could have a compressor problem, a blown fuse, or the compressor could be low

on freon. If the compressor engages but the cab still does not get cold or

gets cool briefly then gets hot again, you could have a plugged orifice tube

which requires evacuating the system. If the compressor engages and the air

does not cool at all, you could have a temp control module problem. The

starting point would be to check the compressor operation. Either way, you

will probably need to consult a QUALIFIED a/c mechanic. Hope this helps a

little.