durango, front ac hot, rear ac vent cold... suggestions?
From : jo
Q: our 2000 durango is blowing hot air from the front vents and cold air from the rear overhead ac vents when the trucks air conditioning system is turned on. the compressor clutch engages. the metal tubes/lines under the hood are both hot to the touch. what could be the problem plugged lines into the front condensor non functioning or stuck vent actuator door or motor any suggestions would be appreciated! .
Replies:
From : christopher d thompson
on sat 31 may 2008 181618 -0500 jo wrote thanks chris. i went out and looked for the items you mentioned and had photos of. i found the driver side and passenger side vacuum tubes. it was apparent that the two visible ones max ac and floor both function fine... in that they shift and blow air from the correct vents... whether or not the max ac vent door is moving properly or too much im not sure. i took some more photos and added some comments that may be interesting to look at. im still stumped as to how to find the other vent door actuators / vacuum lines and also why the ac tubing in the engine compartment is so hot... check out the file and images at this link.. http//whatnotsnthings.com/item%20images/truck%20ac.html jo might be time to beak down and take it to the shop. the picture of your cluster of vac lines is in the area of the blend door motor like i said its up in there. you can lay your hand on the motor and feel for when it moves. but it would be difficult at best to get to. as far whats hot and whats not its hard to say without a set of guages. -- chris .
From : christopher d thompson
on fri 30 may 2008 175119 -0500 jo wrote does the box open so the doors are visible someone else mentioned that a low freon charge could cause one of the two units to blow warm and the other cold. does this make sense seems like if the charge is low it would make both not work well. if the charge was low id suspect both systems would perform equally poorly. there are arms that are visible you will see a rod connected to them on the outside of the box. the box does open but this requires removing the dash and recovering the refrigerant from the a/c system to remove the box before it can be opened. ill post a picture of one tomorrow. -- chris .
From : jo
thanks chris. i went out and looked for the items you mentioned and had photos of. i found the driver side and passenger side vacuum tubes. it was apparent that the two visible ones max ac and floor both function fine... in that they shift and blow air from the correct vents... whether or not the max ac vent door is moving properly or too much im not sure. i took some more photos and added some comments that may be interesting to look at. im still stumped as to how to find the other vent door actuators / vacuum lines and also why the ac tubing in the engine compartment is so hot... check out the file and images at this link.. http//whatnotsnthings.com/item%20images/truck%20ac.html jo on sat 31 may 2008 083306 -0500 jo wrote thankyou! i just looked under the glove box and found one vaccuum line and the box itself but didnt see any rods or anything that looked like flapper valves. i look forward to seeing the picture. jo alright jo i believe i found the doors you are looking for now they are no fun to get to. these links are photographed from the drivers floor board and looking up over the transmission tunnel. the top one black on my truck appears to be the blend door and our suspect on your vehicle my assumption id check the vacuum hoses ect for that door motor make sure they are on and all. in the picture of the black door motor you will also see a large vacuum connector you may also want to check and make sure none of those hoses are chaffed and the connector is seated firmly. the silver motor in the other picture appears to run the direction control. its right above the accelerator on the drivers side of the hump. for your information the motor you did find on the passenger side was the recirc door motor for the inside/outside air selection max a/c on the is the panel/floor door it would appear and is a better picture of what a vac motor for the a/c doors would look like. http//img520.imageshack.us/img520/7758/1003712da6.jpg this is the blend door motor it would appear its way up there and i was only able to get a hand on mine then cycle the controls and feel for it to move. http//img520.imageshack.us/img520/9707/1003711en7.jpg i had hopped to get you a better picture of the actuators but that was the best i could do for ya. -- chris .
From : christopher d thompson
on sat 31 may 2008 083306 -0500 jo wrote thankyou! i just looked under the glove box and found one vaccuum line and the box itself but didnt see any rods or anything that looked like flapper valves. i look forward to seeing the picture. jo alright jo i believe i found the doors you are looking for now they are no fun to get to. these links are photographed from the drivers floor board and looking up over the transmission tunnel. the top one black on my truck appears to be the blend door and our suspect on your vehicle my assumption id check the vacuum hoses ect for that door motor make sure they are on and all. in the picture of the black door motor you will also see a large vacuum connector you may also want to check and make sure none of those hoses are chaffed and the connector is seated firmly. the silver motor in the other picture appears to run the direction control. its right above the accelerator on the drivers side of the hump. for your information the motor you did find on the passenger side was the recirc door motor for the inside/outside air selection max a/c on the is the panel/floor door it would appear and is a better picture of what a vac motor for the a/c doors would look like. http//img520.imageshack.us/img520/7758/1003712da6.jpg this is the blend door motor it would appear its way up there and i was only able to get a hand on mine then cycle the controls and feel for it to move. http//img520.imageshack.us/img520/9707/1003711en7.jpg i had hopped to get you a better picture of the actuators but that was the best i could do for ya. -- chris .
From : jo
on fri 30 may 2008 175119 -0500 jo wrote does the box open so the doors are visible someone else mentioned that a low freon charge could cause one of the two units to blow warm and the other cold. does this make sense seems like if the charge is low it would make both not work well. if the charge was low id suspect both systems would perform equally poorly. there are arms that are visible you will see a rod connected to them on the outside of the box. the box does open but this requires removing the dash and recovering the refrigerant from the a/c system to remove the box before it can be opened. ill post a picture of one tomorrow. -- chris thankyou! i just looked under the glove box and found one vaccuum line and the box itself but didnt see any rods or anything that looked like flapper valves. i look forward to seeing the picture. jo .
From : jo
does the box open so the doors are visible someone else mentioned that a low freon charge could cause one of the two units to blow warm and the other cold. does this make sense seems like if the charge is low it would make both not work well. on thu 29 may 2008 180309 -0500 jo wrote good evening ok ill check the blend door... where is it located im guessing it is on the passenger side below or behind the glove box... how do i check it i looked down by the passenger front door jam and under the glove box and saw one small vaccuum line connection.. it was in place and not leaking air. suggestions on wed 28 may 2008 185900 -0400 peterd wrote the over head a/c unit is a/c only heater vents are piped through the center console between the front seats and runs off the heater core in the front of the truck. blend door or heater valve or both are my guess then. there is no heater valve on a durango. i looked at my 99 durango just to verify that and as i recalled and suspected there is none. i would say its probably a door problem vac motor problem or vac problem. make sure the door moves and there are no vac leaks on the engine. -- chris the blend door is on the heater/ac box under the dash the black box close to the carpet you will see a arm on the box that should move when you select hot or cold. there are a couple of these on there one moves the air from the dash to the floor to the windshield. the other is the blend door make sure they both move with the controls. -- chris .
From : christopher d thompson
on thu 29 may 2008 180309 -0500 jo wrote good evening ok ill check the blend door... where is it located im guessing it is on the passenger side below or behind the glove box... how do i check it i looked down by the passenger front door jam and under the glove box and saw one small vaccuum line connection.. it was in place and not leaking air. suggestions on wed 28 may 2008 185900 -0400 peterd wrote the over head a/c unit is a/c only heater vents are piped through the center console between the front seats and runs off the heater core in the front of the truck. blend door or heater valve or both are my guess then. there is no heater valve on a durango. i looked at my 99 durango just to verify that and as i recalled and suspected there is none. i would say its probably a door problem vac motor problem or vac problem. make sure the door moves and there are no vac leaks on the engine. -- chris the blend door is on the heater/ac box under the dash the black box close to the carpet you will see a arm on the box that should move when you select hot or cold. there are a couple of these on there one moves the air from the dash to the floor to the windshield. the other is the blend door make sure they both move with the controls. -- chris .
From : jo
good evening ok ill check the blend door... where is it located im guessing it is on the passenger side below or behind the glove box... how do i check it i looked down by the passenger front door jam and under the glove box and saw one small vaccuum line connection.. it was in place and not leaking air. suggestions on wed 28 may 2008 185900 -0400 peterd wrote the over head a/c unit is a/c only heater vents are piped through the center console between the front seats and runs off the heater core in the front of the truck. blend door or heater valve or both are my guess then. there is no heater valve on a durango. i looked at my 99 durango just to verify that and as i recalled and suspected there is none. i would say its probably a door problem vac motor problem or vac problem. make sure the door moves and there are no vac leaks on the engine. -- chris .
From : christopher d thompson
on wed 28 may 2008 154802 -0400 peterd wrote on wed 28 may 2008 120432 -0500 jo whatnotnsthings@sbcglobal.net wrote our 2000 durango is blowing hot air from the front vents and cold air from the rear overhead ac vents when the trucks air conditioning system is turned on. the compressor clutch engages. the metal tubes/lines under the hood are both hot to the touch. what could be the problem plugged lines into the front condensor non functioning or stuck vent actuator door or motor any suggestions would be appreciated! q do the rear overhead vents also provide heat when the heater is on by design if not id suspect either the blend door or the heater valve. the over head a/c unit is a/c only heater vents are piped through the center console between the front seats and runs off the heater core in the front of the truck. -- chris .
From : peterd
on wed 28 may 2008 120432 -0500 jo whatnotnsthings@sbcglobal.net wrote our 2000 durango is blowing hot air from the front vents and cold air from the rear overhead ac vents when the trucks air conditioning system is turned on. the compressor clutch engages. the metal tubes/lines under the hood are both hot to the touch. what could be the problem plugged lines into the front condensor non functioning or stuck vent actuator door or motor any suggestions would be appreciated! q do the rear overhead vents also provide heat when the heater is on by design if not id suspect either the blend door or the heater valve. .
From : christopher d thompson
on wed 28 may 2008 120432 -0500 jo wrote our 2000 durango is blowing hot air from the front vents and cold air from the rear overhead ac vents when the trucks air conditioning system is turned on. the compressor clutch engages. the metal tubes/lines under the hood are both hot to the touch. what could be the problem plugged lines into the front condensor non functioning or stuck vent actuator door or motor any suggestions would be appreciated! just a stab but check the blend door and make sure its functioning. -- chris .
From : christopher d thompson
on wed 28 may 2008 185900 -0400 peterd wrote the over head a/c unit is a/c only heater vents are piped through the center console between the front seats and runs off the heater core in the front of the truck. blend door or heater valve or both are my guess then. there is no heater valve on a durango. i looked at my 99 durango just to verify that and as i recalled and suspected there is none. i would say its probably a door problem vac motor problem or vac problem. make sure the door moves and there are no vac leaks on the engine. -- chris .
From : peterd
on wed 28 may 2008 200349 +0000 christopher d. thompson nospam@nospam.nospam wrote on wed 28 may 2008 154802 -0400 peterd wrote on wed 28 may 2008 120432 -0500 jo whatnotnsthings@sbcglobal.net wrote our 2000 durango is blowing hot air from the front vents and cold air from the rear overhead ac vents when the trucks air conditioning system is turned on. the compressor clutch engages. the metal tubes/lines under the hood are both hot to the touch. what could be the problem plugged lines into the front condensor non functioning or stuck vent actuator door or motor any suggestions would be appreciated! q do the rear overhead vents also provide heat when the heater is on by design if not id suspect either the blend door or the heater valve. the over head a/c unit is a/c only heater vents are piped through the center console between the front seats and runs off the heater core in the front of the truck. blend door or heater valve or both are my guess then. .