|
|
hot in the front cold in the rear
|
|
|
| |
|
|
Stegar1
New User
Jun 26, 2012, 10:34 AM
Post #1 of 14
(2304 views)
|
|
hot in the front cold in the rear
|
Sign In
|
|
i have a 2000 ford windstar lx 3.8 with dual air. the front blows hot air and the rear is nice and cold.im stumped! Help!!!!!!!!!!
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Jun 26, 2012, 10:39 AM
Post #2 of 14
(2299 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
Feel the bigger ac line coming through the firewall in the engine bay with the engine running ac on. Should be ice cold.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 26, 2012, 10:41 AM)
|
|
| |
|
|
Stegar1
New User
Jun 26, 2012, 10:52 AM
Post #3 of 14
(2286 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
it is not. both are hot.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Jun 26, 2012, 10:58 AM
Post #4 of 14
(2285 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
Your going to have to hook up a set of AC gauges and monitor the low and high side system pressures.
It could be low on refrigerant. It probably wouldn't be a bad idea to swing into an ac shop and have them recover and weigh the refrigerant that is currently in the system. If it has a low charge weight, they can dye and recharge the system and have you drive it around to see if the dye comes out. Also inspect the hoses, connections, and compressor for oily residue. Oil or wetness around connections and on the front of the compressor hub are signs of leaks.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 26, 2012, 11:01 AM)
|
|
| |
|
|
Stegar1
New User
Jun 26, 2012, 11:17 AM
Post #5 of 14
(2278 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
why would the rear still work?
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 26, 2012, 11:30 AM
Post #6 of 14
(2269 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
Sounds like the front orifice tube is plugged up and needs to be replaced
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Jun 26, 2012, 11:41 AM
Post #7 of 14
(2264 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
I would verify system charge weight first. If the ac shop has the refrigerant recovered they can inspect the orifice while the refrigerant is out. If the orifice is plugged up for some reason, the TXV in the rear should have junk in it too.
Since both front and rear systems share the same compressor, a low charge can cause the rear system to hog most of the refrigerant and starve the front. I don't know the scientific reason behind this, maybe someone can answer that. I'm sure it has something to do with the TXV's ability to regulate refrigerant flow. Path of least resistance may be thru the TXV than the orifice?
Tom is the AC guru, he might have the answer.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 26, 2012, 11:43 AM)
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 26, 2012, 11:50 AM
Post #8 of 14
(2256 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
My experience has been just the opposite. The front generally is colder than the rear when charge gets low. Assuming the poster is correct with all his observations about line temp and rear air temp differential from the front, a plugged tube is about all it can be.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Stegar1
New User
Jun 26, 2012, 12:21 PM
Post #9 of 14
(2246 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
i found a leak on the hose at the back of compressor. from a nut on the bottom of the brass block. is there a flush or a way to check and clear the blockage?
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 26, 2012, 1:05 PM
Post #10 of 14
(2240 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
No, an orifice tube is a small screen that you just replace. You also replace the accumulator while the system is open.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 27, 2012, 3:05 AM
Post #11 of 14
(2199 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
IMO a TXV can rob the bounty of compressed gas and can have more tolerance for an improper charge. O tube if full of debris AND the leak fixed may only temporary if fixed or indicative of what's called "black death" of a compressor throwing debris most usually from lack of lubrication which is carried by proper charge of refrigerant.
Black death is this pic shows at O tube is damning..........
T
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 27, 2012, 3:09 AM
Post #12 of 14
(2193 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
It goes without saying that you have to find out what plugged it up in the first place as it will eventually get the rear also. If someone put sealer in the system any time in the past, that could explain the problem.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 27, 2012, 3:12 AM
Post #13 of 14
(2189 views)
|
|
Re: hot in the front cold in the rear
|
Sign In
|
|
Ayup. Hence that term "black death".............
T
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
Tierod end change caused some kind of leak
2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes
Grounding Cable, 2017 Jeep Renegade Trailhawk
equipment
