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Virtual Wrench
Virtual Wrench, Dodge Mechanic
Category: Dodge
Satisfied Customers: 14612
Experience:  35 years Master Mechanic
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1997 Dodge Ram 1500: air conditioner..the defrost vent

Resolved Question:

My air conditioner is coming out of the defrost vent on my 1997 Dodge Ram 1500, what do i need to do
Submitted: 6 years ago.
Category: Dodge
Expert:  Virtual Wrench replied 6 years ago.



I think possibly that was the vacuum canister??


The default mode is defrost when it loses vacuum to the heater controls under the dash. Thats why it stays on defrost. Check the vacuum line going thru the firewall (passenger side) and there is also a check valve in that vac hose that could be leaking. Basically it comes down to this. The vacuum reservoir stores vacuum so when you give it full gas and the engine vacuum drops, it doesn't affect the dash controls. So you just need to check the vacuum line coming off the engine, then goes to the vac reservoir, then to the firewall to the controls....somewhere in there it is leaking vacuum. If you cant find the reservoir or check valve under the hood, remove the wiper cowl and it will be in there. I know for sure it is on a 95 model. Please don't forget to click on accept so i receive credit.


Thanks for asking!

Customer: replied 6 years ago.
Whats the check valve look like, can you give me a part number or point me to a picture.
Expert:  Virtual Wrench replied 6 years ago.



Look to the left of the trans dipstick. I think it tee's into the vac line.


Click HERE for some info i found for you.




If you have further questions feel free to reply.

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Expert:  Virtual Wrench replied 6 years ago.



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