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Topic: dash air and heater knob. (Read 537 times) previous topic - next topic

dash air and heater knob.

I was having issues with the dash air conditioner this summer and just got around to looking for answers with it.
The air was working "sorta" and I added 134 to the unit. The fan belt wheel for the air conditioner was not catching and spinning until I added the 134. Then it caught and was ok for a few hours. Then it started spinning again and the air was not cold. Taking it to a shop they claimed the unit (pictured) was the issue and should be replaced. Is this true...cause I do not know what the unit was he was talking about. Any answers what I am looking at in the picture?? If this is the case, is it DYI friendly to replace??

Also the rotating knob for the heat/cold is VERY hard to turn and seems to be sticking. I am thinking that cable lube (used in my harley on the clutch cable) would do the trick but want to be sure... any suggestions?

Re: dash air and heater knob.

Reply #1 –
That is the A/C filter drier. If it is leaking then they are correct however if it isn't leaking it won't solve the problem of losing refrigerant.

Re: dash air and heater knob.

Reply #2 –
Is the air conditioner filter easy to change??

Re: dash air and heater knob.

Reply #3 –
I have changed one before, fairly easy. Once that is done the system will need to vacuumed with a vacuum pump. 

Re: dash air and heater knob.

Reply #4 –
Raise the dash lid and you will see a nut on the back side of the temp control knob. While looking at the cable rotate the knob left and right.. you could put a bit of lube on the extended cable and work it back and forth may help unless there is a catch farther up the cable. Ive never tried getting lube farther up into a control cable but after what I described it may free up.

Re: dash air and heater knob.

Reply #5 –
Those driers can corrode on the top surface.  A leak there can be very difficult to detect.

Re: dash air and heater knob.

Reply #6 –
Would adding a can of r134a with dye be helpful in finding a leak?

Re: dash air and heater knob.

Reply #7 –
Quote from: DayDreamer –
Would adding a can of r134a with dye be helpful in finding a leak?
Sometimes. If it is a small leak it is hard to see. Some of the dyes are better than others. I use the uv dye and special glasses and uv flashlight. Even with this I have had to use my sniffer to find leaks. A good A/C shop has the gas sniffer and good dye.


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