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08-20-2019, 09:33 AM
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#1
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Senior Member
Join Date: Jan 2017
Location: Titusville, FL
Posts: 5,164
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Dash Air Problems
I've been chasing a problem with the dash air conditioner on my 2019 Canyon Star. I've had it back to Nappanee and to my dealer. Both checked it and said the charge and pressures are fine and the outlet temp is in the 40's.
However, within a short time of leaving the service facility the outlet temp rises to the mid to high 60's and the dash air is not really supplying much cooling. The dealer contacted Newmar and nobody has been able to resolve the issue to this point. I tried clamping off the hot water hose to the heater core and that may have helped a little but the a/c is still operating way below where it should.
On another thread on IRV2, another CS owner said he had a similar problem and discovered the a/c compressor was cutting off around 1800-2000 RPM. He says the compressor cut off RPM is settable and they raised his to 3200 RPM and solved the problem.
Anybody know any additional details about this?
__________________
When seconds count, the police are only minutes away.
2023 Grand Design 2600RB, 2022 F-350 King Ranch tow vehicle, Titusville, FL when not on the road
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08-20-2019, 10:05 AM
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#2
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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You will find all Evans info in this link, from your description hot water is cutting down on your AC cooling..
The control can be installed incorrectly as one of the threads explains, reinstall as instructions indicate or install a ball valve as many of us did or get new control which maybe damaged because not installed correctly.
Many threads back to the early 2000's with all the same result for correcting.
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08-20-2019, 12:34 PM
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#3
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Senior Member
Join Date: Jan 2017
Location: Titusville, FL
Posts: 5,164
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Quote:
Originally Posted by 007";4919019]You will find all Evans info in [B][URL="http://www.irv2.com/forums/f103/important-information-for-newmar-owners-375453.html
this link[/URL][/B], from your description hot water is cutting down on your AC cooling..
The control can be installed incorrectly as one of the threads explains, reinstall as instructions indicate or install a ball valve as many of us did or get new control which maybe damaged because not installed correctly.
Many threads back to the early 2000's with all the same result for correcting.
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Thanks but I've already done all that. As I stated, I clamped off the hot water line with little (if any) impact. Right now it's in the hands of Newmar. I was just wondering if anyone else had been exposed to a resolution regarding resetting the compressor cut off RPM limit control.
__________________
When seconds count, the police are only minutes away.
2023 Grand Design 2600RB, 2022 F-350 King Ranch tow vehicle, Titusville, FL when not on the road
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08-20-2019, 01:08 PM
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#4
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Senior Member
Newmar Owners Club
Join Date: Dec 2017
Location: Phoenix Az
Posts: 199
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Recently had same problem on my Ventana. On the way to have it checked out the AC simply stopped cooling. They found a bad thermostatic switch which is a Newmar part in the dash AC system, and replaced that switch. Everything works fine now. Apparently they replace a lot of these switches in the field as Newmar uses a cheap part in the factory with a high failure rate
__________________
DC21
2023 Newmar Ventana 3717
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08-20-2019, 01:31 PM
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#5
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Thanks DC21 if you have a part number would help.
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08-20-2019, 01:38 PM
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#6
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Senior Member
Newmar Owners Club
Join Date: Dec 2017
Location: Phoenix Az
Posts: 199
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Sorry, there was no part number on the paperwork, it was just listed as " Switch Therm". I have the old part but it has no markings on it. Sorry, wish I had more info to help
__________________
DC21
2023 Newmar Ventana 3717
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08-20-2019, 01:46 PM
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#7
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Thanks for that.
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08-21-2019, 05:27 PM
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#8
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Senior Member
Join Date: May 2010
Location: Tucson
Posts: 443
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Have you checked the anti-icing thermistor? I had to have mine replaced.
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2018 DUTCHSTAR 4002, 2014 JEEP UNLIMITED RUBICON, 3 CAIRN TERRIERS, MODEL RAILROADER
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08-21-2019, 07:22 PM
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#9
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Senior Member
Join Date: Feb 2017
Location: Arkansas
Posts: 2,552
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I'm dealing with an intermittent problem in my dash air. Often, but not always, after about an hour or so of driving, the dash stop blowing cold air. If I turn AC button off, there is no change in the air temp, it just blows room temp, moist air.
If I let it run with AC switch (button) off for about 15-20 minutes and then re-engaged the compressor/AC button, then it blows cold air again, so I assume icing up or something.
__________________
2019 VTDP 4369 (Spartan)
Wrangler JLU / AF1 Braking / Rock Hard Bumper
2018 Thor ACE 30.3
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08-22-2019, 10:46 AM
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#10
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Senior Member
Join Date: Nov 2009
Location: Bainbridge Island, Wa
Posts: 557
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Quote:
Originally Posted by DC21
Sorry, there was no part number on the paperwork, it was just listed as " Switch Therm". I have the old part but it has no markings on it. Sorry, wish I had more info to help
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Take a picture of the bad part and put it on here
__________________
2004 Newmar Kountry Star Diesel Pusher, Chevy Tracker, Kizzy, Desi,Rosie, Red Ryder and Trek our Vizsla's
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08-22-2019, 12:04 PM
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#11
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Senior Member
Join Date: May 2010
Location: Tucson
Posts: 443
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Tnedator, It is the anti-icing thermistor.
__________________
2018 DUTCHSTAR 4002, 2014 JEEP UNLIMITED RUBICON, 3 CAIRN TERRIERS, MODEL RAILROADER
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08-22-2019, 12:37 PM
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#12
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Senior Member
Join Date: Feb 2017
Location: Arkansas
Posts: 2,552
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Quote:
Originally Posted by TUCSONRAIL
Tnedator, It is the anti-icing thermistor.
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I was trying to find that on comnet yesterday and couldn't.
__________________
2019 VTDP 4369 (Spartan)
Wrangler JLU / AF1 Braking / Rock Hard Bumper
2018 Thor ACE 30.3
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08-23-2019, 10:12 AM
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#13
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Senior Member
Newmar Owners Club
Join Date: Dec 2017
Location: Phoenix Az
Posts: 199
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Attached is photo of the thermos switch that failed on my Ventana. Have no idea where it is mounted but suspect its somewhere in my generator compartment
__________________
DC21
2023 Newmar Ventana 3717
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08-23-2019, 10:28 AM
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#14
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Quote:
Originally Posted by DC21
Attached is photo of the thermos switch that failed on my Ventana. Have no idea where it is mounted but suspect its somewhere in my generator compartment
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Earlier this year or last year, some people were experiencing condensation problems around the dash vents and dripping on floor and feet and circuit boards under dash.
The devise shown in picture does not show up as a Evans part, its location maybe installed on the top side of the dash board if it was installed by Newmar as their part to eliminate the condensation problem.
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