Audi B5 A4 S4 OEM A/C Heater Blower Motor 8D1820021 | eBay (Craig Curry)
There has been other discussion here about there being a resister pack in the fan circuit. Does the blower work on any of the speeds? you should find it not far from the blower motor. Checked all fuses, blower resister and condition of the wiring to the selector switch in the center console.
If I increase it to max I get a hint of air.
Sometimes, corrosion in the cooling system can clog the heater core.
This article originally appeared on YourMechanic.com as Symptoms of a Bad or Failing Heater Blower. My blower motor for my heating and cooling isn't working, i checked the fuses, plugged in an OBD II reader and no codes were found. Over time, sediment and corrosion can decrease the effectiveness of the heater core in your Audi.
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