have a 1999 Dodge Diesel 2500.
The AC/Heating system isn't working properly. If i turn up the heat it makes the temperatrue really hot. Once the heat is on it won't turn off. The fan works fine. I end up turning the whole system off and just rolling down the window but i would like to be able to use the AC.
I already tried to replace the whole control unit. But that didn't do anything.
Any suggestions?
Thanks
2006-08-25 15:26:05 · 3 answers · asked by tyrob 1 in Cars & Transportation ➔ Maintenance & Repairs
i own a repair shop in Tennessee,and i have seen this problem before on the same kind of truck..what i found was damage to the lines that help control the heater box on it they had gotten damaged someway,,and i did what you did ,,i replaced the control unit on it also,,after that didn't work,, i got in under the dash,,and found the problem,,,,it is possible that the lines may have broken,,or came off in under there,,in my case i think a mouse had eat them in to,,at least that what it looked like that happened,,after i repaired them,,everything worked fine,,good luck on yours ,,i hope this help,s
2006-08-25 15:41:21 · answer #1 · answered by dodge man 7 · 2⤊ 0⤋
It sounds like you have a vaccum leak. Is this a vaccum controlled damper system or electric. If it's vaccum, make sure that the vaccum line coming from the engine compartment draws good vaccum. If it's electric, look for the damper arm, it will have a control motor on it. Make sure it's functioning. Also, check the damper air pot actuator if it's vaccum controlled. Good luck.
2006-08-25 22:33:50 · answer #2 · answered by jeff s 5 · 1⤊ 0⤋
The motor that changes the door is sticking in the heat postion .Or the control module that opparates the heater control .I would take it to a good shop .
2006-08-25 22:29:56 · answer #3 · answered by les 3 · 0⤊ 0⤋