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OTR bus air problem: Country Coach conversion
I recently replaced my compressor for the OTR air system for my 95 country coach conversion (for the mid and rear air conditioning system). I had it recharged at the Nashville Prevost service center. The compressor will come on for approximately 5 seconds, turn off for approximatley 10 seconds and continue to cylcle this way. Prevost would not work on the country coach system. What could cause this problem?
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4 Replies
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I also have a Country Coach, 1995 conversion. The salon AC was having a cycling issue and
resulted in a damaged AC compressor. My
issue was the suction pressure was so low, it was causing the compressor to
cycle on/off. It appears my issue is the
suction hoses(restriction in AC lines) are crimped/pinched where they go through the coach floor. This has been a long term problem. I am replacing them now, what a PIB!Additionally, I have installed pressure controls on the
condenser fans, cycling the condenser fans on/off with discharge pressure
swings. During the winter or moderate
temperature, with the condenser fans running all the time, the evaporators
would freeze up. Now the condenser fans
are off during this time.It is not surprising
that Prevost will not repair the CC salon air. It is a complicated system and does not meet
the criteria of Prevost. It will take
time to sort out issues that do not fall into the “replace components” category.
At times, real troubleshooting is
required, meaning a firm knowledge of AC systems is required. I also tried the Prevost repair of the CC AC, no success.Be sure and check for leaks.
The hose ends on mine needed to be recrimped to make a leak free system.If you need to chat, PM me with your contact
phone and a good time to return your call.
I love talking Prevost stuff.Good Luck,
Hector
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Good advice from Hector. As for leaks, the condenser can be a problem due to it’s poor design. It’s mounted under the bus in front of the drive axle and subject to damage from road debris.
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thank you for the information. I have taken it apart where I can see all the components. I can’t even tell where the lines actually go through the floor? Also, I see there are two refrigeration valves. Could these be stuck shut? Also, I’m not sure how to PM from the site?
Thanks,
Eric
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Eric;
I hope this helps you. I have a 1999 Country Coach on the XL chassis that was serviced at Birdland in Houston, Texas until they closed. Since then I have had my CC OTR serviced at Luxury Coach Service in Rockwall, outside of Dallas, Texas. They would be my first choice. In addition, I am sure that National Indoor RV in Dallas or Atlanta or Country Coach in Oregon could help.
The OTR condenser is actually very well protected being tucked away under the coach above the transmission where the air dryer is located. It does get dirty and oily, so it should be cleaned every couple of years to keep it operating efficiently.
I have over 200,000 miles on my coach and like Craig and Mr. Mark, my wife and I had the coach built for us in 1998. I have replaced the OTR compressor twice and both evaporators once. I have had some leaks at the evaporator connections.
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