Mercedes-Benz E430 Problems

Erratic HVAC Blower Motor Operation on Mercedes-Benz E430

Problem Description and Possible Solution

A malfunctioning HVAC blower motor regulator can cause the blower motor to operate below the requested speed or not at all. Updated regulators are available; the blower motor and cover need to be replaced at the same time to upgrade the system.

(21 people reported this problem)

Mercedes-Benz E430 Vehicles With This Problem

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Average mileage: 160,333 (69,000–250,000)
5 model years affected: 1998, 1999, 2000, 2001, more2002
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Viewing 1-9 of 9 comments
The blower fan will sometimes work at full speed and sometimes it won't. The blower operates on low speed but will not switch to high in either auto or manual mode... most of the time. Whe the problem first apperaed it would come on at full blasr when the car was first stated then quickly reduce to low speen. Now it seems to be in low speed all of the time. No fix yet.
Ac Interior Fan Only Blows on low, cold air is good however, when the fan is turned up it stays on low? Only One speed Low ? Fully Service E430
When starting car whether I wait for it to warm up or not inside fan will not come on, then will randomly come on all of a sudden. All other functions, lights, flaps, buttons work fine.
problem first occurred at about 75K mileage. fixed at dealer then recurred again at 153K mileage again.
For the past year fan would blow air and every now and then just not blow anything. As time went on only the side vents would work, now it doesnot blow at all. Is this a regulator issue or bigger problem? Any advise would be helpful,
Erratic fan spped regardless of settings at temperatures heat/AC all the same problem..No idea if it will or will not blow at all. The problem was concealed when vehicle was purchased because the temp setting on AC was set at LO and since I am not a frequent user of AC it was not nocticed that it cuts out --Windter time no defrost.