Hello,

I am having issues with my blower motor working intermittently. It usually takes a hard bump to get it to start working. Does anyone know of any easy fixes I can try before replacing the entire motor? I have looked around for a fuse panel diagram and relay diagram for my car and can’t find anything. I was going to check the relay first to see if it is going bad and then I was going to try the regulator/resistor. If anyone can give me any advice I would be greatly appreciative. Thank you.

Matt
2010 E350 4matic W212

 

If hitting a bump only starts its then most likely the brushes are worn out. You will probably need new blower. ~$140

https://www.fcpeuro.com/products/mer...tor-2128200708

 

Its also possible the connector is not making complete contact. Seems over time either the contacts loosen or have a bit of corrosion buildup. Similar has happened to several here including me with back up camera. Sometimes unplugging and replugging connector a few times can clean off the terminals and you're back in business. At least you can give it a try to see if it helps.

 

Hi. I had same exact issue like 3 weeks ago. Check connector first. For me it was the loose connector. It wasn't plugged inn properly. I pushed it inn and so far so good..

 

Blower replacements are common on this model. Given the posts above it would be interesting if they were due in large part tot he connectors.