Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE CHASSIS CLUB FORUMS > Ford Motorhome Chassis Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 04-07-2020, 03:10 PM   #1
Join Date: Nov 2017
Posts: 93
R134 Port on 1994 Ford F53

When I remove the blue cap on my R134 port, the system releases pressure. It doesn't leak when the cap is in place. I've never seen that before on another vehicle. The smell of the escaping gas didn't smelled more like stale air that freon. I didn't leave the cap off long enough to really inspect anything. Is the port defective? Is this normal? I wanted to check pressure on the system, but this can't be right.

semcha is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-07-2020, 03:54 PM   #2
Senior Member
Join Date: Jul 2014
Posts: 28,543
There is a Schrader valve in the fitting. Like a tire valve core.

It must be stuck open.
twinboat is offline   Reply With Quote
Old 04-07-2020, 07:27 PM   #3
Senior Member
Join Date: Nov 2014
Location: Monterey Bay, California
Posts: 227
Originally Posted by semcha View Post
When I remove the blue cap on my R134 port, the system releases pressure.
What twinboat said and...Are you certain you have R134A refrigerant? R134A was mandated starting 1995. You say your chassis is 1994, and frequently they are one year earlier than the coach manufacture date.

If the A/C system is an Evans TempCom, This link may be of interest to you.
There is a PDF copy of the A/C systems built for the F53 chassis that contains much info, in one place, that is not always easily available. Currently, the site may be unavailable because of " the Virus situation", but this is where I downloaded it from. Too large to transfer here.

2015 Fleetwood Flair 26D
2014 JKU Rubicon Towed some
2018 JK Rubicon Towed more
PSOUZA is offline   Reply With Quote
Old 04-08-2020, 12:03 AM   #4
Senior Member
chboone's Avatar

National RV Owners Club
Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 3,550
134A has different connections then R12 did. If you have standard 1/4" flare fittings you have R12. If your connections larger and look like a quick connect fitting you have 134A. As for the Schrader valve leaking when you take the cap off I wouldn't worry about. It will get changed if you ever have the system service.
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
chboone is offline   Reply With Quote
Old 04-09-2020, 02:28 AM   #5
Join Date: Nov 2017
Posts: 93
r-134a refrigerant

It is r-134a. It is printed on the refrigerant line and on a port on the system. Thanks for the replies!
semcha is offline   Reply With Quote
Old 04-09-2020, 06:56 AM   #6
Senior Member
Join Date: Apr 2018
Posts: 647
if your system is still cooling, you could try removing cap and quickly depress the needle of the valve it may reseal. if it doesn't cool make sure to replace core before recharging
I came into this world with nothing, and I still have most of it left
Dom is offline   Reply With Quote
Old 04-09-2020, 06:59 AM   #7
Senior Member
Sbrownstein's Avatar
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 1,696
If you are concerned, virtually all HVAC techs have a tool that allows them to replace the Schrader valve while the system remains fully charged.
Scott Brownstein
Palm Island, Florida
2015 Georgetown 335DS
Sbrownstein is offline   Reply With Quote

f53, ford

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Where is OBD1 Port 1994 F53? C5c5 Ford Motorhome Chassis Forum 6 11-02-2019 03:43 PM
1994 Holiday Rambler Ford F53 external fuel pump marcsrv Class A Motorhome Discussions 7 12-14-2013 01:55 PM
R12 to R134 Conversion ChasL Class C Motorhome Discussions 6 01-14-2013 02:33 PM
Dash air after R134 charge Jeff753 Monaco Owner's Forum 10 09-09-2012 05:49 PM
How many cans of R134 to fill system from empty? k1hog Workhorse and Chevrolet Chassis Motorhome Forum 7 08-02-2010 06:05 AM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 01:29 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.