Heater blower motor stopped working. Where is the motor location in an 1993 Audi 100? Also, where are the blower motor resistor and switch located? Is the load reducing relay on this circuit as well? Btw, the electronic controls appear to be fine. We're feeling heat in the vents, but no air.

i don't know. please look in owner's manual for fuse location and inspect/change. my blower [Ranger pick up] was located under hood in front of passenger seat and i bought a used blower to save $$$$. easy for me to install. friend's car [pontiac vibe] had bad heater resistor cardon inside firewall at passenger's feet.- $75 new - easy to replace.

Hi Victor,here's a link to the blower motor resistor,Usually when it is stick on high,the resistor is bad,can't tell by looking at it. GET 25 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS Here's the resistor. Heater Blower Motor Resistor at AutoZone com Best Heater Blower Motor... Take your's off and take it to Autozone and they will get you the right one,it's showing 2 types,and if it doesn't solve the problem,they will take it back.

Hi Carlos,here's a link to your blower motor,the resistor is located next to the blower,2 screws hold it on,just remove electrical connector and screws and take to Autozone and match up,very easy to do. GET 25 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS Here's the part. Heater Blower Motor Resistor at AutoZone com Best Heater Blower Motor...

Before removing the heater switch on this 2006 citroen hdi I would first have the blower motor checked and the most common reason for this and other blower problems would be the blower resistor.

Your blower works on and off at times, first locate the blower motor and the resistor. the blower motor is located on the heater box, look under the pass/side of the dash, you may have to remove under dash cover to see blower.
When you have located the blower now look to the side on the heater box, there you will see a connector plug, it plugs into a connection on the heater box, this will be the resistor, the resistor slides into heater box and the end of it bolts to box to hold it in place and then the connector plugs into it, if you can not locate it then follow wires that plug into blower , follow wires back they will lead you to resistor,
next time blower does not work wiggle connector to resistor and see if blower turns on, if it does then resistor is the problem. also unplug resistor plug at resistor and check for any burning of connectors at plug and inside resistor.

I would bet its a bad resistor or the plug is brunt due to high draw from bad connections, if plug has burn damage to connectors then replace the plug along with resistor.

A heater blower motor resistor is an electronic device with three or more progressive resistors that allow the heater blower motor to operate at slower speeds. The highest speed of the heater blower motor is not controlled by the resistor, so when the resistor fails, the fan will often work on the highest speed setting, but not the lower speeds.
To resistor is generally located under the dashboard and under the hood, near the blower motor . The resistor's electrical connector is disconnected, the resistor is removed and the new resistor is installed. On some vehicles it may be easily accessible, and on others it may take partial dashboard removal to replace the resistor.
Look under the hood, generally the wiring for the Blower resistor is attached to the wiring to the blower motor itself
It's inboard & below the motor, near the accumulator. You can see it standing beside the passenger fender. it's the off-white connector behind the L heater hose above the vacuum reservoir & the white WARNING sticker

your resistor is faulty. replace it.it is located right on your blower motor which is on the front passenger side under your dash.You cant miss it.

Good chance it's the resistor . Will be in circuit between switch and blower, usual locations are on ducting under dash on passenger side, or behind glove box. Locate wires coming from blower motor, and follow them back to resistor.

this is for manual heater system. If you have electronic (digital display) you don't have one. Instead you have a blower motor speed controller.

here is info

Control System Outputs—Manual A/C
Blower Motor Switch Resistor
The heater blower motor switch resistor has the following features:

• The assembly is located in the engine compartment on the evaporator housing toward the center of the vehicle.
• Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
• Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
• An overheating protective device (thermal limiter) will open the resistor coil when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except HI.
• The thermal limiter cannot be reset and is not serviceable.

Replace your blower resistor located under the passenger side dash.

it could be a 7 dollar resistor thats bad. Thats located behind the fluid washer resovoir.