Novak Conversions Jeep Wrangler TJ engine mounts

Air Flow issues

Jeffery

Member
Original poster
Joined
Nov 5, 2018
Messages
34
Location
Minnesota
I live in MN where the winters are cold. I am having a terrible time with air flow of the heating system. I have replaced the blower motor and it is certainly blowing away....but very little of it's air actually makes it out the vent. It has some flow but it is hard to get comfortable in the winter. The air is hot so it isn't that it is not heating, it is specifically that the air is not being forced out. I have put a borescope in the vent to see if there was an obstruction of some kind (mouse nest for example) and there wasn't anything that jumped out. I put the leaf blower underneath with the recycle flap open to see if I got a cloud of dust or something that would indicate and obstruction with no luck. I though perhaps the the blower motor wasn;t sealed to the mounting surface, but their doesn't seem to be a gasket around the blower, instead it looks like an overlapping plastic flange so that seems solid. I checked to see if there was anyway I could have plugged the wires in backwards so that the motor is turning the wrong way...they are poke-yoked so that you cannot do this.

What am I not considering??!!....the wife is starting to pine for having a "professional" take a look...YIKES!
 
Did you replace the electrical connector for the blower motor at the same time as the motor?

Off the top of my head, it sounds like your blower motor is running backwards.
 
... I have put a borescope in the vent to see if there was an obstruction ...

Was that from inside the cab? What about under the cowl, outside? Remove the cowl cover, and then remove the plastic rain guard on the passenger side (3 screws). You can look straight down into the fan. Or snake your borescope into there through the vent, if it will fit.

Cowl_open.jpg
 
What does "the vent" mean? I would look into whether the air can be properly diverted to defrost,dash and floor. If it's going to more than one it will seem like less flow.

I would also make sure i had all speeds for the blower motor. The switch and resistor can both fail
 
Novak Conversions Jeep Wrangler TJ engine mounts