Fan blower ac heater not working

Aug 20, 2019 | 10:56 AM

Maximas

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1995 e420

Fan blower ac heater not working

I’m trying to fix my fan blower I already replaced the blower and the Heater A/C Fan Blower Regulator Resistor but that didn’t fix the problem. Checked the fuses and they seem fine . What could be the issue?

Aug 21, 2019 | 12:50 AM

cfrantz

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1987 MERCEDES 300E

You may have to break out the volt meter and track down where the voltage loss to blower is. Could be a relay, a wire, or even the control unit.

Aug 21, 2019 | 11:34 PM

Maximas

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1995 e420

fixed the problem with the fan it was the strip fuse by the fuse box. now i have to figure out why the ac doesn't blow cold and the middle outlets don't blow air at all.

Aug 22, 2019 | 09:02 AM

cfrantz

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1987 MERCEDES 300E

I forgot about that strip fuse. I have had that go out before also. The middle vents no working are typically due to failed blend door actuators, they have a tendency to leak vacuum and will have to be replaced. You might also check the vacuum distribution ports on the AC/Heater control panel and make sure it is working properly. AC not blowing cold can be a fuse, short in the feed wire, bad AC control panel, low refrigerant, AC relay, AC RPM sensor on the back of the compressor. If I remember correctly there is a 50 step test procedure to find the electrical failure if the failure isn't mechanical. This link should help, http://www.w124-zone.com/downloads/M.../103index.html

Section 83 is for climate control systems.