Sponsored by Winnebago Industries

Author Topic: Dash AC Expansion Valve  (Read 448 times)

IslandGuy

  • ---
  • Posts: 468
Dash AC Expansion Valve
« on: June 01, 2017, 08:49:39 PM »
There is something about expansion valves and me :'(
I recently had an expansion valve replaced in my basement AC which cost $$$ but the AC seems to be working quite well now...I'll see as we are leaving on Tuesday for a few months.
I was a bit suspicious of my dash AC...it seemed to not be blowing out cold enough air. I checked it today and at the highest setting and at MAX AC I measured 54 degrees. I think it should be closer to 40 degrees.
I checked the firewall and there was a drop of oil on the expansion valve...looking further there was oil stains on the metal frame below it...see the photo.
Great...I suppose I am low on Freon...a few calls around and I found a replacement expansion valve and also a shop that could get me in tomorrow to evacuate the system and replace the expansion valve! So hoping that this takes care of my dash AC issue....
Always something...eh!
« Last Edit: June 01, 2017, 08:55:41 PM by IslandGuy »
Jim

2009 WGO Tour 40TD
2012 Honda Fit Sport 5 sp, SMI Stay-In-Play
Saddlebrooke, AZ

"Your beliefs don't make you a better person...your behavior does."

John Canfield

  • Forum Staff
  • ---
  • *
  • Posts: 11807
    • Jane and John's Internet Home
Re: Dash AC Expansion Valve
« Reply #1 on: June 02, 2017, 07:24:45 AM »
Oh brother Jim - you and air conditioners. I wonder what exactly in an expansion valve would fail and leak.  Keep us updated.
--John
2005 Horizon 40AD, 2006 Jeep Rubicon Unlimited
Our Horizon projects
Our weather

IslandGuy

  • ---
  • Posts: 468
Re: Dash AC Expansion Valve
« Reply #2 on: June 02, 2017, 05:53:05 PM »
All done....evacuated, replaced the expansion valve and recharged for $200...Dash AC measured much cooler out of the air vents...of course it was 99 degrees in the cab when I picked up the MH!
Jim

2009 WGO Tour 40TD
2012 Honda Fit Sport 5 sp, SMI Stay-In-Play
Saddlebrooke, AZ

"Your beliefs don't make you a better person...your behavior does."

JTsBoss

  • ---
  • Posts: 28
Re: Dash AC Expansion Valve
« Reply #3 on: July 31, 2017, 08:45:32 PM »
I keep losing my charge and for the life of me can't find the leak. It also doesn't blow as cold as it should. You have me wondering about the valve.
2002 Adventurer with Banks Kit
24' Pace Enclosed
1 Trailer Toad

JoelP

  • ---
  • Posts: 365
Re: Dash AC Expansion Valve
« Reply #4 on: July 31, 2017, 11:59:42 PM »
This makes me wonder if those recharging kits from Target can be used to top up the AC on the dash AC unit of an RV.
Joel from San Jose

2010 Itasca Suncruiser 37F
8.1L Chevy Workhorse with Banks PowerPack
2016 CMax Energi Hybrid dinghy

IslandGuy

  • ---
  • Posts: 468
Re: Dash AC Expansion Valve
« Reply #5 on: August 01, 2017, 07:02:36 AM »
I know when the shop repaired my AC they used Freon with dye...if you have a leak I would at least charge the unit with freon/dye and hopefully you can find where it is leaking. On my AC it was quite obvious that there was a leak at the expansion valve.
After finishing our 2 month trip in very warm weather we were always very comfortable as far as both the dash and basement AC units!
Jim

2009 WGO Tour 40TD
2012 Honda Fit Sport 5 sp, SMI Stay-In-Play
Saddlebrooke, AZ

"Your beliefs don't make you a better person...your behavior does."

John Canfield

  • Forum Staff
  • ---
  • *
  • Posts: 11807
    • Jane and John's Internet Home
Re: Dash AC Expansion Valve
« Reply #6 on: August 01, 2017, 07:42:56 AM »
I keep losing my charge and for the life of me can't find the leak. It also doesn't blow as cold as it should. You have me wondering about the valve.
I've had quite a bit of trouble with my dash air over the years. First time it broke, the dryer/filter was replaced - apparently crud in the lines accumulated to the point to where not enough refrigerant could circulate.  Then we had a system leak, the compressor seals were leaky, new compressor and we're back in business.

Just recently Winnebago Factory Service found a crack in the plastic duct handler/box that was admitting hot air. The entire dash would need to be disassembled to replace the box (the box itself was ~$500) so we settled on a patch. So we're back in business again  ::) . For how long anybody knows.
« Last Edit: August 01, 2017, 07:45:23 AM by John Canfield »
--John
2005 Horizon 40AD, 2006 Jeep Rubicon Unlimited
Our Horizon projects
Our weather

Malibu39

  • ---
  • Posts: 19
Re: Dash AC Expansion Valve
« Reply #7 on: August 09, 2017, 11:03:04 PM »
I don't metro hijack this thread but I see that John Canfield has a very similar RV to mine and I have an AC question. My basement AC does not quite keep up when its really warm.  On several occasions, its been in the 100s and it get up to the mid 80s inside the coach.  Is this normal?  Thank you.
2004 Itasca Horizon 40KD 350 Cummins, 60,000 miles

John Canfield

  • Forum Staff
  • ---
  • *
  • Posts: 11807
    • Jane and John's Internet Home
Re: Dash AC Expansion Valve
« Reply #8 on: August 10, 2017, 08:47:15 AM »
The best your basement air is going to do is 20-30 degrees differential from outside air temps to your return air duct. We've beat this topic to death so please search this board for basement air - you will get a good education. Assuming you don't have any air leaking in the ductwork in the rear cap, the solution is adding a roof air. Your basement unit is rated at two tons (24,000 BTU) which is not enough - there is too much heat gain from the side walls, front cab area, etc for two tons to keep you cool. Adding a roof air will provide an additional 13.5k BTU (or even 15k BTU.)
--John
2005 Horizon 40AD, 2006 Jeep Rubicon Unlimited
Our Horizon projects
Our weather

 

Hosted by Over The Network