January 28th, 2013 in Cars How to Repair Blower Motor Issue Time Required: 20 minutes Tools Required: Phillips screwdriver Cost to Repair: $45.00 Last week the blower for the A/C and heater stopped working on my 2003 Acura TL Type-S. The climate control unit will turn on, but you cannot feel the air because the blower will not blow. I tried turning it on Full Auto in both the hot and cold settings, nothing. I turned the fan knob to max and still nothing. When you turn the climate control unit on, you can hear the compressor under the hood turn on. The problem is clearly the blower not turning on. After some online research, I learned that much like the seat heater problem, this too is a common issue for the Acura TL (as well as other Honda and Acura models). A friend had this same issue with his Acura TSX. The solution: Replace the blower resistor. I am not a mechanic. Follow my advice at your own risk. This repair is easy and cheap- so don’t be scared.

Be sure to disconnect the battery, wear safety glasses, put on gloves, tie your shoes, chew with your mouth closed, and any other safety stuff that makes you not sue me. Most of the time, the problem is that the blower resistor needs to be replaced. But first check to make sure the issue is not something else like a blown fuse or corroded connector. The blower fuse is located under the hood (it is close to the firewall on the passenger side for my model). samsung window ac customer care numberThe fuse is labeled “Heater Motor” on the fuse cover.ac and heating window unit If the fuse looks good, move on to the blower inside the car. ac motor control directionThe blower motor is located below the glove box. Notice the giant yellow arrow pointing to the location.

Here you can see the blower motor and the blower motor resistor. Disconnect the wiring connector from the blower motor to make sure there isn’t any corrosion or connection issues. Sometimes corroded connectors [photo] will cause the failure. These are clean, this is not the problem… On to the blower resistor. Follow the wiring harness from the blower motor to the blower motor resistor. It is a white plastic trapezoidal-ish piece that is fastened by two Phillips head screws. Remove the two screws that fasten the blower resistor in place. This will allow you to pull the blower resistor down and disconnect the wires. Gently pull the blower resistor down and disconnect the wiring connector. Here is a close up of the resistor after it has been removed. These connectors look clean too. The metal side of the blower resistor had some crud on it. I don’t know if this was any indication of it being broken or not. Replace the blower resistor with a new one. This part can be purchased at most auto parts stores.

I paid $41.99 plus tax at AutoZone. To reinstall the part, simply screw the resistor back into place with the two screws. Reconnect all the wiring and test by turning on the climate control fan. It should work perfectly now. If you continue to have issues, you might need to visit your mechanic. Did this repair worked for you? Please leave a comment below and include the year, make and model of your car OR share this fix with other Acura/Honda Owners: content to be helpful, entertaining, or life-changing, feel free to make a financial contribution on my Patreon account. Any contributions help me afford the time to create more articles, videos and other content. Tags: ac, acura, blower, Cars, honda, repair, resistor, tl, type-sThe part number for the kit is 05102406AA and the MSRP is $19.65. ** Update: New and improved parts are available for this repair ** The new resistor is p/n 5179985AA  (MSRP $77.95). Wiring kit (with mounting plate) p/n 68052436AA is also required  (MSRP $32.35).

Blower motor resistor (p/n 5179985AA) and harness upgrade kit (p/n 68052436AA) The cause for this failure may be the motor, or blower wheel assembly. Debris from the environment may attach to the wheel causing additional weight, and drag on the motor. If the motor is worn from age, the effort to operate the motor could cause high current draw. Verify current draw with an amperage meter. Amp draw should be approx (13-17) amps when blower is operating on high mode Some owners have elected to repair the wiring by soldering wire splices directly to the terminals inside the blower motor control box and not using a connector. Blower motor resistor block / blower motor controller - Manual temperature control system Models with the standard manual temperature control system have a BLOWER MOTOR RESISTOR. The blower motor resistor is mounted to the bottom of the HVAC housing, under the instrument panel and just inboard of the blower motor. It can be accessed for service without removing any other components.

The resistor has multiple resistor wires, each of which will reduce the current flow to the blower motor to change the blower motor speed by changing the resistance in the blower motor ground path. The blower motor switch directs the ground path through the correct resistor wire to obtain the selected speed. With the blower motor switch in the lowest speed position, the ground path for the motor is applied through all of the resistor wires. Each higher speed selected with the blower motor switch applies the blower motor ground path through fewer of the resistor wires, increasing the blower motor speed. When the blower motor switch is in the highest speed position, the blower motor resistor is bypassed and the blower motor receives a direct path to ground. The blower motor resistor block cannot be repaired and, if faulty or damaged, it must be replaced. - AZC (Automatic Zone Control) system Models equipped with the optional Automatic Zone Control (AZC) system have a BLOWER MOTOR CONTROLLER.

The controller allows the selection of almost infinitely variable blower motor speeds. The controller is mounted to the HVAC housing, under the instrument panel and just inboard of the blower motor, in the same location used for the blower motor resistor on manual temperature control systems. It can be accessed without removing any other components. The blower motor controller output to the blower motor can be adjusted by the blower motor speed switch knob on the AZC A/C Heater control panel, or it can be adjusted automatically by the logic circuitry and programming of the AZC control module. In either case, the AZC control module sends the correct pulse width modulated signal to the blower motor controller to obtain the selected or programmed blower motor speed. The blower motor controller cannot be repaired and, if faulty or damaged, it must be replaced. The A/C Heater blower motor is controlled by a rotary-type blower motor switch, mounted in the A/C Heater control panel.

On vehicles with manual temperature control systems, the switch allows the selection of four blower motor speeds, but will only operate with the ignition switch in the On position and the A/C Heater mode control switch in any position, except Off. On vehicles with the Automatic Zone Control (AZC) systems, the switch allows the selection of Lo Auto, Hi Auto, and ten speed settings between Lo and Hi. On manual temperature control systems, the blower motor switch is connected in series with the blower motor ground path through the a/c heaterThe blower motor switch directs this ground path to the blower motor through the blower motor resistor wires, or directly to the blower motor, as required to achieve the selected blower motor speed. On AZC systems, the blower motor switch is just one of many inputs to the AZC control module. In the manual blower modes, the AZC control module adjusts the blower motor speed through the blower motor controller as required to achieve the selected blower switch position.

In the auto blower modes, the AZC control assembly is programmed to select and adjust the blower motor speed through the blower motor controller as required to achieve and maintain the selected comfort level. The blower motor switch cannot be repaired and, if faulty or damaged, it must be replaced. The switch is serviced only as a part of the a/c heater control assembly. 1. FUSE: Blower motor power feed circuit fuse may be blown. 2. COLD ENGINE LOCK OUT FEATURE: Some models with auto temp control (ATC) incorporate a feature involving the body control module that prevents blower motor operation when engine coolant temp is below approx (98F) degrees. This feature is cancelled if manual blower motor fan speed is selected. 3. CIRCUIT WIRING AND CONNECTORS: Check all related circuit wiring / connectors / power feed and ground connections. Check for poor pin connections and chafed wiring harness (rub through) causing short to power or ground. Check blower motor control switch (fan switch) operation.

Check blower motor relay. 4. INSTRUMENT PANEL SIDE BOLTS: Some models use the large bolts at each end of the instrument / dash panel to provide ground path to the chassis. Check for secure and clean connection at instrument panel side bolts. 5. POWER MODULE: Some models equipped with auto temp control (ATC) use a power module to engage the blower motor relay. Check ATC power module operation. Replace ATC power module as required. IMPORTANT Verify correct wiring harness and resistor card is used for proper blower motor operation. 6. IGNITION SWITCH: Some models use the ignition switch to engage the blower motor relay. Defective ignition switch may allow the blower motor to operate with the ignition off. Check ignition switch operation and related circuit wiring to blower motor relay. 7. BLOWER MOTOR RESISTOR: Disconnect and isolate the battery negative cable and unplug the wire harness connector from the blower motor resistor. Check for continuity between each of the blower motor switch input terminals of the resistor and the resistor output terminal.

In each case there should be continuity. If OK, repair the wire harness circuits between the blower motor switch and the blower motor resistor or blower motor as required. If not OK, replace the faulty blower motor resistor. The blower motor circuit resistor will disengage the power feed to the blower motor if high circuit load is detected. A blown resistor may indicate interference or drag is being placed on the blower motor fan or the blower motor has an internal problem. Blower motor may operate on one speed only if resistor is blown on some models. Suggest blower motor amperage draw test. Amp draw should be approx (13-17) amp when blower is operating on high mode. Check all related circuit wiring and replace blower motor if higher than normal amperage draw is detected. 8. BLOWER MOTOR FAN: Check blower motor fan (squirrel cage) for debris or damage. Verify fan is secure to blower motor shaft. 9. BLOWER MOTOR: Check blower motor operation manually with jumper test wires to power source and ground.

Replace blower motor if internal problem is suspected. 10. BLOWER MOTOR SWITCH: Check for battery voltage at the fuse in the Power Distribution Center (PDC). If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Remove the a/c heater control from the instrument panel. Check for continuity between the ground circuit cavity of the a/c heater control wire harness connector and a good ground. There should be continuity. If OK, go to Step 3. If not OK, repair the open circuit to ground as required.With the a/c heater control wire harness connector unplugged, place the a/c heater mode control switch knob in any position except the Off position. Check for continuity between the ground circuit terminal and each of the blower motor driver circuit terminals of the a/c heater control as you move the blower motor switch knob to each of the four speed positions.