cor howser
 |
|
• fort lauderdale, FL, USA |
|
• Registered on 3/2/2005 |
|
• 7 posts |
|
|
|
 Posted:3/2/2005 12:18 |
|
|
|
My XLT Diesel has the manual a/c/ system. When I use the heat, the system only allows you to bring in fresh air from outside. The heat does not work in the recirculation mode. You cannot adjust the temeperture dial if the air is in the recirculation mode (Max a/c). The problem is that when I have the heat on, the fumes from the diesel become impossible to deal with especially at traffic lights. The heat just sucks in the diesel fumes. The vehicle manual does say that when the a/c system is set to Max A/C, the temperture dial will not work. Is there anyway to recirculate the air in the truck and get heat at the same time? Ford says No. Can the system be retrofitted to the automatic a/c system sold in the Limited Model? Is it costly? My father in law has a limited automatic system and he can reirculate the heat to avoid bring in the diesel fumes. Help Please! |
|
CHPMustang
 |
|
• Plano, TX, USA |
|
• Registered on 7/24/2002 |
|
• 1,800 posts |
• 1
|
|
|
Posted:3/2/2005 12:57 |
|
|
Welcome to the Excursion forums cor howser 
You know we get the same thing with our Excursion and I know were not the only ones with the manual AC dilema.
I've given some thought about tinkering with the vacuum system which controls what vents the airflow comes out of.
The electronic AC controls do have a price tag and I believe the main dash harness has to be changed,modified or something,I'll have to dig around to get some info on that swap
Bill.
Bill
2002 Excursion XLT-P 4x4 7.3L Powerstroke Diesel
|
|
CHPMustang
|
|
• Plano, TX, USA |
|
• Registered on 7/24/2002 |
|
• 1,800 posts |
• 1
|
|
|
Posted:3/2/2005 13:16 |
|
|
I dug up this post from a fellow Excursion owner in Denver;
| Quote: | The Max a/c position closes the vacuum controlled heater valve and goes to recirculated air to give the maximum cool air.
Running heat in Max a/c will cause the windows to fog up given the right atmospheric
conditions. I have customers that think they need a heater replaced when all they are doing is selecting recic/max/inside air when using the heater.This is on systems that give the operator separate manual control of this function.
Some systems also close the heater valve when vent or off is selected.
Although I don't recommend it you can remove and plug the vacuum line on the heater water valve under the hood to prevent the valve from closing.
Again, recirculated air is not recommended for heating a vehicle interior.
Your a/c will operate (outside temps permitting) in all positions except off/vent/floor. The purpose is to dehumidify the air. |
Guess the vacuum line going to the valve shutoff can be disconnected and plugged(temporarily) to see if heat will come out of the dash vents.
Bill
2002 Excursion XLT-P 4x4 7.3L Powerstroke Diesel
|
|
E. Long
 |
• Subscriber since 1/1/2001 |
|
• Atlanta, GA, USA |
|
• Registered on 1/23/2001 |
|
• 2,229 posts |
• 1
|
|
|
Posted:3/2/2005 13:21 |
|
|
| Quote: | | My XLT Diesel has the manual a/c/ system. When I use the heat, the system only allows you to bring in fresh air from outside. The heat does not work in the recirculation mode. You cannot adjust the temeperture dial if the air is in the recirculation mode (Max a/c). The problem is that when I have the heat on, the fumes from the diesel become impossible to deal with especially at traffic lights. The heat just sucks in the diesel fumes. The vehicle manual does say that when the a/c system is set to Max A/C, the temperture dial will not work. Is there anyway to recirculate the air in the truck and get heat at the same time? Ford says No. Can the system be retrofitted to the automatic a/c system sold in the Limited Model? Is it costly? My father in law has a limited automatic system and he can reirculate the heat to avoid bring in the diesel fumes. Help Please! |
cor howser, welcome to the site!
There must be an exhaust leak or a cracked vent tube somewhere that is causing exhaust to get into the cab. I do not get any diesel smell at all in my vehicle. I run the panel/floor and floor mode all the time for heat during the winter. I spend a fair share of my time in stop and go traffic as well. I would look there before diving into modifying the controls. Ford has done their manual vent/air controls like this for many, many, many years.
BTW, I see that you're in Florida. I didn't realize Floridians knew how to use heater controls in their vehicles!! 
-Eric
'67 Galaxie 500 - 390 FE, .030" over, FE to AOD adapter, disc brake conversion. The Daily Driver.
'00 Excursion - 7.3L PSD, LANDYOT Gen-II Radius Rods, Factory Tech Valve Body, 200K+ miles and going |
|
cor howser
|
|
• fort lauderdale, FL, USA |
|
• Registered on 3/2/2005 |
|
• 7 posts |
|
|
|
|
Posted:3/2/2005 13:41 |
|
|
|
Thanks for the response. Cant wait to see what you come up with. Fortunately in Florida I only have to use the heat a few times a year in the winter time. |
|
cor howser
|
|
• fort lauderdale, FL, USA |
|
• Registered on 3/2/2005 |
|
• 7 posts |
|
|
|
|
Posted:3/2/2005 13:44 |
|
|
|
Why does the automatic a/c system allow recirc in heat mode. Mu Suburban, which I just traded to get this 2005 Excursion had manual recirculating heat. I never had a fog up issue. Additionally, my friends e-350 diesel van allows you to recirculate the heat. There has got to be something that made the engineers not allow recirculation of heat. I am basically recirculating diesel fumes through my truck. Why cant it be done on the manual a/c system but can be done on the automatic system? Thanks for the help. |
|
CHPMustang
|
|
• Plano, TX, USA |
|
• Registered on 7/24/2002 |
|
• 1,800 posts |
• 1
|
|
|
Posted:3/2/2005 14:09 |
|
|
I just communicated with a friend of mine that's a Ford Senior Master Technician and he said just remove the vacuum line from the coolant shutoff valve and you'll get heat in the cab while the MAX AC is on  He states he has it done to his Excursion and just hooks the vacuum line back up in time for summer.
Bill
Bill
2002 Excursion XLT-P 4x4 7.3L Powerstroke Diesel
|
|
cor howser
|
|
• fort lauderdale, FL, USA |
|
• Registered on 3/2/2005 |
|
• 7 posts |
|
|
|
|
Posted:3/2/2005 14:47 |
|
|
Are there any other ramifications to disconnecting that line? I'd rather smell the diesel then have my motor or radiator or something blow-up or break. Any warranty issues? Since he is a master technician, does he know why the manual a/c does not allow temperture adjustment or recirculate while the automatic system does?
Thanks for your help |
|
cor howser
|
|
• fort lauderdale, FL, USA |
|
• Registered on 3/2/2005 |
|
• 7 posts |
|
|
|
|
Posted:3/2/2005 15:07 |
|
|
|
Just wanted to let you know that I met with the service manager and head mechanic at my ford dealer. Fortunately, I had just gotten your posting before I went over there. I told him about disconnecting the tube from the coolant valve. I HAVE RECIRCULATED HEAT. It worked. Its amazing how information gets around. Now if someone goes to that dealer with the same problem they will know what to do. Unforunately, because there are no service bullitens out, most dealers and mechanics probably do not know how to do that. Anyways, thanks for the help. |
|
CHPMustang
|
|
• Plano, TX, USA |
|
• Registered on 7/24/2002 |
|
• 1,800 posts |
• 1
|
|
|
Posted:3/2/2005 16:52 |
|
|
Glad I could help and even better you have recirculated heat now  I haven't had time to tackle the mod yet but this evening.
You should be able to adjust the Hot/Cold to a comfortable level,if you can could you verify it?
Post up any other questions or join in on any of the threads anytime
Bill
Bill
2002 Excursion XLT-P 4x4 7.3L Powerstroke Diesel
|
|