Skip to main content ↑ ↓
Topic: Ford HVAC control on dash (Read 831 times) previous topic - next topic

Ford HVAC control on dash

My heat/cool control is inoperative so that I have no heat. It turns past the stop on the red side and seems very loose internally. I probably have other problems besides this control, but I have to start with it. I am pretty certain that these are Ford controls. Anyone know of a source for these? There is no Ford dealer in this town. This is not a desperate situation, but I would just like to get this repaired.
Royce & Denise, MC #17410
'01 U320 4220 ISM450 Build #5895 SOLD
Toad: '10 Honda CR-V

Travel makes one modest. You see what a tiny place you occupy in the world. - Gustave Flaubert

Re: Ford HVAC control on dash

Reply #1 –
Yours is probably vacuum controlled, and if so, I would check that you haven't lost your vacuum pump.  On our 91 GV, I had to replace some of the  vacuum sys. components, but the pump was good.  ----  have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: Ford HVAC control on dash

Reply #4 –
The vacuum pump is located in the step door area and yes it is a Ford product. Available on e bay.  This operates the dash air by opening the vents.  When you first turn on the key listen for noise in step area.  Goes off after vacuum is pulled.
Dan & Shirley Stansel
2002 U295 4020 AGDS Build#6054
Towing Buick Enclave & M &  G Braking
Emerald Bay, Lake Palestine, Texas
MC# 16650

Re: Ford HVAC control on dash

Reply #5 –
I could be wrong, but I am pretty sure that there is no vacuum pump in the HVAC system in our 99' U270. I took out the step well, and the only thing inside that cavity were the two air cylinders for the step. I have the plenum (and the dash area) taken apart right now, and all the flapper door actuators are electric.
Don
The selected media item is not currently available.
Don & Tys
1999 U270 3602 WTFE #5402
Xtreme Stage 1 w/Headlight, Step Conversion, etc.
2009 Honda Fit Sport with Navi
Freedom is NOT "just another word for nothing left to lose"... with apologies to Kris Kristofferson

Re: Ford HVAC control on dash

Reply #6 –
My '99 uses vacuum for the blend doors and a vacuum generator is under the step. It is the air venturi  type not an electric pump. Air pressure goes through a valve and creates vacuum from venturi effect that attaches with a hose to a reservoir can which supplies the vacuum for the HVAC system. I have a previous post on how to fix the generator so buying an electric pump isn't necessary.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Ford HVAC control on dash

Reply #7 –
There is a vacuum pump under the step in 01. My 99 did not have it so you are right on that Don.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: Ford HVAC control on dash

Reply #8 –
Perhaps it is a difference between the U320 AND U270, rather than a difference between years. As I understand it, theU320 (and I believe the U295) have a separate zone control for the passenger side of the dash HVAC. Perhaps that added control requires the vacuum assist... just speculating.
Don
Quote from: John S –
There is a vacuum pump under the step in 01. My 99 did not have it so you are right on that Don.
The selected media item is not currently available.
Don & Tys
1999 U270 3602 WTFE #5402
Xtreme Stage 1 w/Headlight, Step Conversion, etc.
2009 Honda Fit Sport with Navi
Freedom is NOT "just another word for nothing left to lose"... with apologies to Kris Kristofferson
 

Re: Ford HVAC control on dash

Reply #9 –
Quote from: Don & Tys (AKA acousticart) –
Perhaps it is a difference between the U320 AND U270, rather than a difference between years. As I understand it, theU320 (and I believe the U295) have a separate zone control for the passenger side of the dash HVAC. Perhaps that added control requires the vacuum assist... just speculating.
Don
Probably a good call. We do have the 2 zones
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean