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Evap core freezing up? #4478555
08/03/17 08:29 PM
08/03/17 08:29 PM
Joined: Nov 2016
Posts: 1,303
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,303
WI
Just got back from a roundtrip to Memphis with my LR3. On the way back today, I noticed that after about 5-6 hours of solid driving with the AC on and recirc on, it didn't feel like there was the normal volume of air coming out. I turned off recirc (for the rest of the trip), and then turned the AC off for about 5 mins and then stopped for gas. It was perfect after that, lots of water was dripping out. Then again just as I neared home (about 5-6 hours later) it started feeling a bit clogged again. Temps where in the 80s most of the way and then in the 60s once I got back into Wisconsin. Is this normal? It was about 12 hours of continuous driving, with maybe 3 10 minute breaks to get gas. Never have driven that continuously before. AC still blew cold, as cold as ever. Seemed fine on the way there last week. Don't think it's low on charge. FWIW, it's never had AC work done and I've never swapped the cabin air filter. Is this something to worry about?

Thanks!


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Evap core freezing up? [Re: HoosierJeeper] #4478563
08/03/17 08:45 PM
08/03/17 08:45 PM
Joined: Mar 2014
Posts: 3,807
NJ
Leo99 Offline
Leo99  Offline

Joined: Mar 2014
Posts: 3,807
NJ
No expert here but I think you've diagnosed it. I wouldn't worry about it.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 370,000 miles
2015 Camry 70,000 miles
Re: Evap core freezing up? [Re: HoosierJeeper] #4478575
08/03/17 09:08 PM
08/03/17 09:08 PM
Joined: Jul 2012
Posts: 691
Perth, Western Australia
Brad_C Offline
Brad_C  Offline

Joined: Jul 2012
Posts: 691
Perth, Western Australia
The LR3 has a high side pressure sensor and an evaporator temperature thermistor. It's a TXV with variable displacement compressor and a fairly impressive control system. If it iced up it should throw a code on the ATCM. Know anyone with a Ford T4 compatible scanner than can get a code from there?

If you've never had it re-gassed it would be worth getting the residual charge size measured, but I've got nothing else to contribute. With the control system that car has a plugged cabin air filter shouldn't be an issue.
If the charge was low enough to cause icing, it should be fairly noticeably impacting your day to day cooling though.

Re: Evap core freezing up? [Re: HoosierJeeper] #4478576
08/03/17 09:09 PM
08/03/17 09:09 PM
Joined: Jul 2009
Posts: 866
texas
danez_yoda Offline
danez_yoda  Offline

Joined: Jul 2009
Posts: 866
texas
Dont know about a car but the evaporator core freezing in a house is usually a sign it is low on refrigerant.

Also check you cabin air filter, If it is clogged it could restrict the air flow.

Re: Evap core freezing up? [Re: Brad_C] #4478593
08/03/17 09:29 PM
08/03/17 09:29 PM
Joined: Nov 2016
Posts: 1,303
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,303
WI
Originally Posted By: Brad_C
The LR3 has a high side pressure sensor and an evaporator temperature thermistor. It's a TXV with variable displacement compressor and a fairly impressive control system. If it iced up it should throw a code on the ATCM. Know anyone with a Ford T4 compatible scanner than can get a code from there?

If you've never had it re-gassed it would be worth getting the residual charge size measured, but I've got nothing else to contribute. With the control system that car has a plugged cabin air filter shouldn't be an issue.
If the charge was low enough to cause icing, it should be fairly noticeably impacting your day to day cooling though.


That's what I was thinking about it being low...it should be warm. It's still very cold and if there's anything I notice in a vehicle, it's AC lol.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Evap core freezing up? [Re: HoosierJeeper] #4478606
08/03/17 09:38 PM
08/03/17 09:38 PM
Joined: Dec 2006
Posts: 1,024
midwest
JamesBond Offline
JamesBond  Offline

Joined: Dec 2006
Posts: 1,024
midwest
You've never changed the cabin air filter??

Re: Evap core freezing up? [Re: HoosierJeeper] #4478609
08/03/17 09:39 PM
08/03/17 09:39 PM
Joined: Jun 2003
Posts: 5,979
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,979
Illinois
Should be a temp sensor on the evap core to keep it above 35F.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Evap core freezing up? [Re: HoosierJeeper] #4478627
08/03/17 10:00 PM
08/03/17 10:00 PM
Joined: Nov 2016
Posts: 1,303
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,303
WI
Forgot it had a cabin air filter till today and I'll look into the temp sensor. Thanks for the help so far, still listening to all of the advice!


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Evap core freezing up? [Re: HoosierJeeper] #4478692
08/04/17 01:32 AM
08/04/17 01:32 AM
Joined: May 2012
Posts: 6,158
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline

Joined: May 2012
Posts: 6,158
Fort Lauderdale, FL
Bet it's clogged cabin filter.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Evap core freezing up? [Re: HoosierJeeper] #4478698
08/04/17 02:45 AM
08/04/17 02:45 AM
Joined: Jun 2015
Posts: 577
New York
NoNameJoe Offline
NoNameJoe  Offline

Joined: Jun 2015
Posts: 577
New York
Lack of airflow would probably result in the evaporator icing up as would a low charge. Cabin air filter would probably be easiest to check (depends on car really).


2015 Civic LX Coupe
Re: Evap core freezing up? [Re: HoosierJeeper] #4478727
08/04/17 05:35 AM
08/04/17 05:35 AM
Joined: Jul 2005
Posts: 31,677
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 31,677
NY
Usually it's caused from a lack of airflow. I'd check the cabin air filter and clean the housing where it sits out real good. I'd also check the condenser and make sure that's nice and clean, probably not the cause of the problem but often neglected. Next in line would be the refrigerant charge.


God Bless Our Troops

Re: Evap core freezing up? [Re: HoosierJeeper] #4478795
08/04/17 07:28 AM
08/04/17 07:28 AM
Joined: Sep 2015
Posts: 1,693
USA
mk378 Offline
mk378  Offline

Joined: Sep 2015
Posts: 1,693
USA
Lack of charge will not cause freeze-up in an auto system. They have different controls than home systems.

Re: Evap core freezing up? [Re: HoosierJeeper] #4478839
08/04/17 08:38 AM
08/04/17 08:38 AM
Joined: Jun 2003
Posts: 5,979
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,979
Illinois
If the settings are in recirc the cabin filter is out of the equation.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Evap core freezing up? [Re: HoosierJeeper] #4478877
08/04/17 09:16 AM
08/04/17 09:16 AM
Joined: Nov 2016
Posts: 1,303
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,303
WI
Going to change the cabin filter.

And it was in recirc for the first part, then I stopped using recirc and it still did it FWIW.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Evap core freezing up? [Re: HoosierJeeper] #4478912
08/04/17 10:24 AM
08/04/17 10:24 AM
Joined: Nov 2016
Posts: 1,303
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,303
WI
Pulled the old cabin filter out and it's nasty. It's damp too. Is that normal?


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
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