The water temp switch that rests beneath the heater core. Should go to the AC amp and fan relay but I cannot find the connector.
A/C system - how to remove the cooling unit, evaporator, expansion valve (9 Viewers)
- Thread starter alia176
- Start date
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Look at my media pics. The black two wire harness coming up and crossing behind the main harness toward the driver’s side with the air mix servo just behind it. Does anyone know where this wire plugs in?
I think it might just get shoved into the back of the evaporator core. Pretty sure it doesn't have a place that it plugs into, it's just a temp sensor.
Have you taken the evaporator out yet? There is a wire and I am pretty sure it is the wire you are talking about and it is shoved into the fins on the back side of the evaporator. There is a little plastic doodad that holds it in place, but there is no specific spot that accepts it.
I ran into the same issue recently and came to the conclusion that the sensor is only utilized in trucks with automatic climate control, which mine did not have. Something along the lines of the computer using that temp sensor to determine when it's hot enough to run the heat after cold starts.
As a result I left it unhooked and haven't had any issues since.
That conclusion makes sense. Cannot say the thought of auto climate control had not crossed my mind.
That wire is the evaporator thermistor. I am referring to the water temp switch wire coming from directly beneath the heater core.
I have the same issue, no air output from vents even though blower runs.
Mine is due to mice claiming my vehicle as a home for three years while I was living abroad. They built nests everywhere, including the ac vents. Based on your above nesting picture maybe you have the same issue. Also, when I hit the high button the blower begins to make a weird noise, I think this is because of back pressure or something since the air has nowhere to go. I need to pull the dash and the cooling unit (again) to snake/clean the vents just haven't gotten around to it.
So your vents may be blocked causing the low air output you are experiencing.
I guess I will post this in the main thread
your evaporator is probably clogged. Sounds like the fan motor bearings may be going as well. Would not pull it if I did not have to. Suggest you work your way across. Mice had gotten into my ducts. Whole thing had to be sanitized.
alia176
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- Thread starter
- #215
Charles - I'm not able to answer your question unfortunately. I was hoping that my pics showed you what you needed but I wasn't concentrating on that part of the heater core and sch.
For others, if your fan is making a terrible sound on Med or High mode, there *might* be a dead mouse or a mouse nest inside the squirrel cage. That was the issue in my case and it happened twice. The blower simply gets out of balance. The second time I managed to guillotine the poor creature's head off when the fan was turned on. Removing the blower is a piece of cake job and can be done in less than ten min with a phillips or a 10mm, can't recall which.
For others, if your fan is making a terrible sound on Med or High mode, there *might* be a dead mouse or a mouse nest inside the squirrel cage. That was the issue in my case and it happened twice. The blower simply gets out of balance. The second time I managed to guillotine the poor creature's head off when the fan was turned on. Removing the blower is a piece of cake job and can be done in less than ten min with a phillips or a 10mm, can't recall which.
I applies stainless steel woven mess pieces custom cut to all openings to the air inlets and sealed with beads of rtv during my rebuild. This should prevent leaves entering the shroud, or any other significant pests from entering the system. Be aware, if you live out west, Hanatvirus is carried by some rodents. This little disease will kill you.
Here is the product info for the stainless steel woven mesh. Other items needed to seal the system from rodents are:
Armaflex insulating tape
Silicon RTV gasket maker
3M trim adhesive
Line Product Ordered Shipped Balance Price Total
1 85385T48 304 Stainless Steel Wire Cloth, 10 x 10 Mesh Size, 0.075" Opening Size, 3 Feet x 3 Feet 1
Each
1 0 68.85
Each
68.85
Notes
McMaster-Carr does not collect Alabama sales/use tax. This purchase is not exempt from Alabama sales/use tax merely because it was made over the Internet. Alabama requires purchasers to pay sales/use tax using the state's forms. See www.mcmaster.com/tax/AL for more information.
Don’t forget to seal up the defrost panel!
This should keep your system cleaner
Armaflex insulating tape
Silicon RTV gasket maker
3M trim adhesive
Line Product Ordered Shipped Balance Price Total
1 85385T48 304 Stainless Steel Wire Cloth, 10 x 10 Mesh Size, 0.075" Opening Size, 3 Feet x 3 Feet 1
Each
1 0 68.85
Each
68.85
Notes
McMaster-Carr does not collect Alabama sales/use tax. This purchase is not exempt from Alabama sales/use tax merely because it was made over the Internet. Alabama requires purchasers to pay sales/use tax using the state's forms. See www.mcmaster.com/tax/AL for more information.
Don’t forget to seal up the defrost panel!
This should keep your system cleaner
Made more progress today. Got everything buttoned up and now I am going to pull a vacuum overnight since I have had this open for several weeks at this point. Spent time repainting and treating a bunch of stuff along the way.
Looking really good so far!
