Anyway to inspect evaporator without disassembly?

4x4dually

4x4dually

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Can I get to the evaporator with a bore scope of something through a vent? I think it is plugged up but don't know how or where to get to it. I'm NOT looking forward to tearing the dash up... again.
 
Pull the fan motor, pass side under the dash, you'll need an 8mm socket and a 4 inch extension. Once you have it out of the way you can reach in and feel it. I usually hit it with some cleaner and a water hose at least once a year.
 
Thanks goat boy and texican. :D I hate dashes. Seems like there are always parts left over. LOL

I'll try to check it out tonight.
 
Unhook the plug for the motor first if you can, it can be a biatch, has a little clip thingy it goes into and it difficult to handle with the motor hanging. Other than that it's really easy.
 
Do you by chance know if there is a resistor pack and where it would be that controls the speeds? I have....off...and HIGH! Not much inbetween. I know it is freezing up because it drips for hours after use. I put gauges on it and it reads about 200 on the high side. I've learned a lot of things over the years about this truck but A/C is not a strength yet.
 
Does your system blow heat and cold? If not I would check your blend door. If its working there is a possibility that the foam gasket came loose.
 
It blows really hot and really cold and the blend works fine. I just only have two speeds with one being OFF and it drips for hours on end after driving. I'm assuming the speed selector is shot and it is dirty and ices up. I hope it doesn't cost me much. :(
 
I just did this this weekend. You can drop the fan motor down (back screw is a bioch) and feel or get a mirror or a flash light and look if you want. I sprayed some mild quick drying solvent in there and used a water hose with a trigger gun nozzle on it and sprayed it out. Put a towel down in the floor so you don't soak it. it will even come out of the floor vents.

If you have only high and off that means chances are you need a resistor in there. I did this to mine this weekend and it made it so much better and it blows way harder.
 
Thanks man. Is the resistor mounted on the motor? Is there a couple of them? I haven't looked up the diagram yet...maybe I should do that.

Thanks for the info guys!
 
Found them on the diagram....just need to find where they are mounted now.

ACResistors.jpg
 
Most times it is the one that would be standing in water (if drain is clogged or slightly clogged). The one right by the fan motor always seems to be the problem on most any vehicle. Even more so when the fan goes out.
 
Also it is mounted in between the motor and the box where the core is on the bottom side. Lay down in your floorboard looking up and you should see it. You can see wires going into it and it should have 2 gold colored screws holding it up.
 
Jory, the resistor on mine was inside the airbox, where the puddling water did a number on it, available at napa.
 
Billysgoat said:
Jory, the resistor on mine was inside the airbox, where the puddling water did a number on it, available at napa.
Click to expand...

I think this would seem to be my problem without even looking at it. I'll try to check tonight. Or I may want to just get a new pack to have to replace it when I'm in there so I don't have to take it apart twice.

I just got a new Stihl FS90 just now so I'm more apt to weedeat 10 acres tonight than work on the ol' broke POS dodge. LOL


Muchas Grassyass.
 
If you only have high and off, yes, it is the resistor, mine stuck on off and low, which really sucks in Florida in the summer LOL
 
Pulled the motor and the resistor block. Block was cracked from heat and the thermal was tripped. The motor seems to not turn too easily which would fry the resistor. I re-soldered the thermal and epoxied the ceramic back on the block. Then I lubed up the fan with some air tool oil. Put it all back together and whalla! 4 speeds! The evaporator looked fine..well, I say looked, I couldn't find a mirror but I felt of it. I sprayed some Simple Green in there then sprayed water and it all drained out the bottom. I'm going to buy a new fan and a new resistor block today just so it don't catch fire, but it worked great on the way to work!

Thanks for all the info! Moving on to the next item up for bid...a carrier bearing. When I die, I will have NO nickel and dimes left. LOL
 
My fan speeds still work but randomly the fan will start to squeak and squeel and I just can't bring myself to replace it because it still works. I'm really cheap LOL
 
If you unplug it, pull the three bolts, then pop the tube off at the back, there is a hole in the motor for cooling where you can drop some oil on the end of the shaft. Then you can pull the blade and drop some oil on that end. Hold the motor up in the hole, put the rubber breather tube back on, then place the plastic shroud over it. Piece-o-cake.

For the rear screw, use a 1/4 screwdriver type socket driver, a 3 inch extension, then a universal adapter, then a 8mm deep socket. You have to do it by feel, but it ain't really that hard.
 
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