Current Classifieds

Wanted Pinto Fiberglass Body Parts
Date: 05/19/2018 04:56 pm
1973 Pinto Runabout

Date: 03/25/2019 09:02 pm
79 pinto front,rear alum bumpers

Date: 07/17/2018 09:49 pm
SVO SWAP
Date: 03/15/2018 03:12 am
Windshield
Date: 01/15/2022 09:31 pm
74 & Up Parts
Date: 01/20/2021 03:22 pm
71-71 speedo cable
Date: 07/31/2021 09:04 pm
WANTED: Dash, fender, hood, gauge bezel '73 Wagon
Date: 01/18/2017 05:35 pm
Floor pans for my 1975 Pinto Sedan
Date: 12/09/2016 08:34 am
78 fender and hood
Date: 03/23/2021 01:07 pm
74 Pinto Wagon Squire.Bright blue

Date: 06/30/2018 09:48 am
1979 Pinto 3-door Runabout *PRICE REDUCED*

Date: 01/21/2023 04:19 pm

Author Topic: 1972 A/C Blower Switch and Vent Issues  (Read 1346 times)

0 Members and 1 Guest are viewing this topic.

Offline 1972 Wagon

  • Pinto Full Member
  • ***
  • Posts: 119
  • FeedBack: +27/-0
  • Gender: Female
  • 1972 Pinto Wagon

  • Total Badges: 4
    Badges: (View All)
    Fifth year Anniversary Mobile User Signature Topic Starter
1972 A/C Blower Switch and Vent Issues
« on: January 25, 2017, 03:50:42 PM »
My 1972 wagon has factory installed A/C. I have had an ongoing issue with the blower switch. The switch has the following positions: Off, Low, Medium, and High. The switch only works on high speed. The switch was replaced a while back and the lower speeds initially worked and then stopped. Where should I start looking for the cause? Today when I had the instrument cluster and radio out, I did a quick check of the wires and didn't see anything obviously disconnected or bare. The second issue is with the two dash vents and the floor vents. No matter where the vent lever is placed, the air only comes out of the defroster vents. I know that the issue is probably a vacuum leak as my 89 Burb had a broken lever clip in the vent box that I had to repair (Cheap plastic that dried in the Florida heat). Again, is there a good place to start checking? Any tips or suggestions would be appreciated.
*The Original Family Car: A 1972 Pinto Wagon*
Ordered by my folks from Bunnell Motor Company, Inc., Bunnell, Florida
Delivered: June 20, 1972
Entrusted to my care: August 1976

Offline pinto_one

  • Pinto Master
  • *****
  • Posts: 1008
  • FeedBack: +70/-0
  • Gender: Male
  • Pinto-One

  • Total Badges: 10
    Badges: (View All)
    1000 Posts Photographer Tenth year Anniversary Topic Starter Signature Poll Voter Mobile User Apple User Windows User Fifth year Anniversary
Re: 1972 A/C Blower Switch and Vent Issues
« Reply #1 on: January 25, 2017, 06:43:12 PM »
One the fan speeds you will have to check the fan resistor , it is a part that the fan switch plugs in and on side of the a/c unit inside the car , its held on by two screws and a plug in the middle that the wires go to the switch , the have coils that reduce the voltage for the fan on of them is broke or burned , you should see it in the front of the case , if you have air blowing out the defrost you have a vacuum problem , car that age may not have the hose hook back up , or the vacuum can is rusted out on the bottom , hope this helps , Blaine
76 Pinto sedan V6 , 79 pinto cruiser wagon V6 soon to be diesel or 4.0

Offline 1972 Wagon

  • Pinto Full Member
  • ***
  • Posts: 119
  • FeedBack: +27/-0
  • Gender: Female
  • 1972 Pinto Wagon

  • Total Badges: 4
    Badges: (View All)
    Fifth year Anniversary Mobile User Signature Topic Starter
Re: 1972 A/C Blower Switch and Vent Issues
« Reply #2 on: January 25, 2017, 09:05:35 PM »
Thanks for the suggestions Pinto_One! I just checked the vacuum canister hose that runs to the engine. The hose is a tad short and it had worked loose. When I thought about it, I realized that the Pinto was running a bit rough when I pulled it into the garage today. Problem solved! The vents are now working. Checking the blower resistor will be the next step.
*The Original Family Car: A 1972 Pinto Wagon*
Ordered by my folks from Bunnell Motor Company, Inc., Bunnell, Florida
Delivered: June 20, 1972
Entrusted to my care: August 1976