My vehicle has the same problem that many others have previously posted about - I am able to get both hot and cold air from the vents, but no far / blower whatsoever, no matter the adjusted fan speed (MIN / AUTO / MAX).
Earlier today I attempted to determine whether my HVAC's Blower or my HVAC's Blower Regulator is the culprit - thanks to help from detailed proceedures that other boarders have provided as insight. However, I was unable to come to a conclusion...
1st. When getting to the blower and blower regulator I noticed that my filter was extremely dirty. I noticed that one person on this board quoted $100 for the part. Is this correct? - very pricey if in fact the amount!
2nd. I had planned to bypass the regulator by connecting the "blue" wire directly to the blower, but hesitated when I touched a part of the blower with a screw driver which resulted in a large spark. The vehilce was turned off at the time. Does the Blower hold a charge to it after the car it turned off!? If so how do I "decharge" it so to evade shocking myself - what precautions should I take?
3rd. After the above incident I determined that I would hold off on the diagnosis for now - but by eye balling the electric lines that run from the vehicle to the regulator back to the blower - I was confused as to how I should simply take the regulator out of circut. I do not want to cut any of the wires. Is there a plug and play way to go about this?
I do not have a digital camera to take a picture of my regulator and blower, but as you can see from the picture embedded in the link above - All of the power lines are covered - how am I supposed to "jump" the blue from the regulator directly to the blower???
4. If the entire blower is the culprit - is this easily removed? I could not figure out how to remove the whole piece even if i wanted to - does anyone know where the screws for such are?
I was able to free up the bearing on mine, with a little ATF (suggested by knowledgeable person). The assembly comes out by removing the screws around the perimeter.
The filters are xpensive, The dealer gets a lot more since the filter with the activated charcoal is different (some have installed aftermarket.
The blower is not fused, but is controlled by the matrix which does more than min, med, max. and is variable depending on the voltatge sent to it. It is a surprize that the motor is hot with the ign off, but with MB you never know.The controller uses the frame of the blwer as a heat sink, and it does dissipate a lot especially at low or mid speed.
The regulators are typically $150 the motor only usually $400 the whole assembly $600. MB only sells the assembly I think Fast Lane sells the motor but people have broken the blade trying to remove it
Filter with charcoal is over $100. Filter w/o charcoal is under $30. And,
how about just getting a cigarette lighter power cord and attaching long leads to it. Then just briefly put 12V from your cigarette lighter to the motor to see if it runs. This is what I've done to get 12V easily to test some things.
Here are pics of pollen filters from board sponsor www.autohausaz.com site. I find their prices are often the best and buy from them a lot, but always shop around first to the many online parts suppliers.
I didn't see the need for the extra activated carbon so just went with the inexpensive filter on my 600. They are interchangeable.
I'm going to look more into "jumping" the regulator and powering the blower directly. If it works... my order for the regulator is being placed ASAP. Thanks for the help!
Linear Mode
