Excursion ac system malfunction
Logistics Pro
Joined: Mar 2010
Posts: 3,535
Likes: 500
From: NC
So, I have 2 Excursions. My 2000 is a stock system and will freeze you out. My 2005 has had tons of money put into it and really starts not cooling well at 90 degrees, it was horrible when we drove through the desert. So what is the difference? Cooling fan for diesel and gas are different and the 2000 is a standard control, the 2005 is EATC.
All components in the 2005 have been flushed or replaced except for the rear evaporator, rear expansion valve AND rear filter, yes, there is a filter. Cost for the filter is .50 at RockAuto. I am going to tackle the rear system, replacing the filter, expansion valve and evaporator. I will also be replacing the orifice tube and dryer --AGAIN--. The compressor has been replaced several times and IMO, the rear air has a restriction from debris.
https://www.rockauto.com/en/moreinfo...pt=15479&jsn=7
It frustrates me that the auction buy 2000 $2000 old farm truck Excursion will run you out being so cold and the 2005 Diesel, that has been overly maintained for 15 years, where I have spent thousands on it to fix the A/C does not perform well.
All components in the 2005 have been flushed or replaced except for the rear evaporator, rear expansion valve AND rear filter, yes, there is a filter. Cost for the filter is .50 at RockAuto. I am going to tackle the rear system, replacing the filter, expansion valve and evaporator. I will also be replacing the orifice tube and dryer --AGAIN--. The compressor has been replaced several times and IMO, the rear air has a restriction from debris.
https://www.rockauto.com/en/moreinfo...pt=15479&jsn=7
It frustrates me that the auction buy 2000 $2000 old farm truck Excursion will run you out being so cold and the 2005 Diesel, that has been overly maintained for 15 years, where I have spent thousands on it to fix the A/C does not perform well.
Cargo Master
Joined: Nov 2017
Posts: 3,110
Likes: 540
From: Rock Hill, SC
If the electronic ac system has a thermister inserted into the evap coil, not sure as I have the analog system, you can move it closer to the exit of the evap coil so it senses cold temps later.
Laughing Gas
Joined: Sep 2013
Posts: 1,209
Likes: 171
From: SoCal
I’ve had nearly every component in my a/c system replaced with all OEM parts and the vent temperature varies. One time I saw it as low as 45 deg but most of the time it varies from 49-52 deg.
Max outside temps were 93 and as low as 80. I haven’t seen any consistency in vent versus outside temps.
shouldn’t the vent temp be more consistent in the 45 deg range?
what vent temps are you guys getting?
Max outside temps were 93 and as low as 80. I haven’t seen any consistency in vent versus outside temps.
shouldn’t the vent temp be more consistent in the 45 deg range?
what vent temps are you guys getting?
Laughing Gas
Joined: Sep 2013
Posts: 1,209
Likes: 171
From: SoCal
I’ve had nearly every component in my a/c system replaced with all OEM parts and the vent temperature varies. One time I saw it as low as 45 deg but most of the time it varies from 49-52 deg.
Max outside temps were 93 and as low as 80. I haven’t seen any consistency in vent versus outside temps.
shouldn’t the vent temp be more consistent in the 45 deg range?
what vent temps are you guys getting?
Max outside temps were 93 and as low as 80. I haven’t seen any consistency in vent versus outside temps.
shouldn’t the vent temp be more consistent in the 45 deg range?
what vent temps are you guys getting?
Logistics Pro
Joined: Mar 2010
Posts: 3,535
Likes: 500
From: NC
I think it depends on the ambient temperature and humidity. Mine definitely suffers in 86+ weather with high 50's output, at 100 degrees I am lucky to see 60-65, this is on the 6.0L, I haven't done a reading on the 6.8L.
The Struggle Bus¯\_(ツ)_/¯
Joined: Jan 2022
Posts: 695
Likes: 310
If we get similar results, then I'm going to start seeing if it is the Electronic Climate Control, the thermistor location, or if there is a unique heater core thing specific to the 6.0L. I've read about people installing a ball valve on the heater loop to improve A/C performance to prevent heat from bleeding into the system.
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Logistics Pro
Joined: Mar 2010
Posts: 3,535
Likes: 500
From: NC
The hot water valve should cut off all heater core flow, mine was not so I plumbed it into the recirc door.
Question: Could the rear a/c keep the front A/C from working properly? I am very suspect of that little filter, expansion valve and rear core itself, the only parts that have not been replaced.
Question: Could the rear a/c keep the front A/C from working properly? I am very suspect of that little filter, expansion valve and rear core itself, the only parts that have not been replaced.
Cargo Master
Joined: Nov 2017
Posts: 3,110
Likes: 540
From: Rock Hill, SC
The hot water valve should cut off all heater core flow, mine was not so I plumbed it into the recirc door.
Question: Could the rear a/c keep the front A/C from working properly? I am very suspect of that little filter, expansion valve and rear core itself, the only parts that have not been replaced.
Question: Could the rear a/c keep the front A/C from working properly? I am very suspect of that little filter, expansion valve and rear core itself, the only parts that have not been replaced.
I would think not as the TXV restricts the freon when the system is not in use to prevent freezing, and varies/regulates the freon when it is in use. A clogged strainer filter should mimic a closed TXV.
Logistics Pro
Joined: Mar 2010
Posts: 3,535
Likes: 500
From: NC
I am thinking the filter may be plugged but if I have to evac the system I am going to replace the filter, receiver drier, orifice tube and rear expansion valve. We have a trip the 4th of July and will tackle it after that. I am going to use the 6.8L and get the pressures off of it, maybe I can mimic those on the 6.0L when I recharge it.
5th Wheeling
Joined: May 2022
Posts: 25
Likes: 9
I’ve replaced everything on my 6.0 with the automatic climate control and rear AC. Orface, rear filter, expansion valve front and rear evaporator, drier, condenser, compressor, and the temperature blend actuator. Outdoor temp probe reads accurate.
Same results as the rest of you. I get mediocre performance over 85° or so.
I’m suspecting the amount of refrigerant to be incorrect. I’m probably going to take it to a shop next week for a full diagnostic to see what’s causing the poor AC performance.
Same results as the rest of you. I get mediocre performance over 85° or so.
I’m suspecting the amount of refrigerant to be incorrect. I’m probably going to take it to a shop next week for a full diagnostic to see what’s causing the poor AC performance.
Cargo Master
Joined: Nov 2017
Posts: 3,110
Likes: 540
From: Rock Hill, SC
I’ve replaced everything on my 6.0 with the automatic climate control and rear AC. Orface, rear filter, expansion valve front and rear evaporator, drier, condenser, compressor, and the temperature blend actuator. Outdoor temp probe reads accurate.
Same results as the rest of you. I get mediocre performance over 85° or so.
I’m suspecting the amount of refrigerant to be incorrect. I’m probably going to take it to a shop next week for a full diagnostic to see what’s causing the poor AC performance.
Same results as the rest of you. I get mediocre performance over 85° or so.
I’m suspecting the amount of refrigerant to be incorrect. I’m probably going to take it to a shop next week for a full diagnostic to see what’s causing the poor AC performance.
Logistics Pro
Joined: Mar 2010
Posts: 3,535
Likes: 500
From: NC
I’ve replaced everything on my 6.0 with the automatic climate control and rear AC. Orface, rear filter, expansion valve front and rear evaporator, drier, condenser, compressor, and the temperature blend actuator. Outdoor temp probe reads accurate.
Same results as the rest of you. I get mediocre performance over 85° or so.
I’m suspecting the amount of refrigerant to be incorrect. I’m probably going to take it to a shop next week for a full diagnostic to see what’s causing the poor AC performance.
Same results as the rest of you. I get mediocre performance over 85° or so.
I’m suspecting the amount of refrigerant to be incorrect. I’m probably going to take it to a shop next week for a full diagnostic to see what’s causing the poor AC performance.
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