In this video, I show how to diagnose and replace the blower motor (heater fan) on a Mercedes A-Class W169 and Mercedes B-Class W245, especially when the heater resistor keeps failing or burning out.

A failing blower fan often draws too much current, causing the resistor pack to overheat and blow repeatedly. If your heater only works on full speed or stops working completely, the blower motor is the most common cause.

This tutorial walks through the full removal procedure, fitting a new blower fan, and checking the resistor to prevent further failures.

🔧 What You Will Learn

Symptoms of a failing blower fan

How to access and remove the blower motor

Heater resistor troubleshooting

Why resistors keep blowing on W169/W245

How to install a new blower unit and reconnect wiring

Preventing future resistor failure

🚗 Compatible Models

✔ Mercedes A-Class W169 (2004–2012)
✔ Mercedes B-Class W245 (2005–2011)
✔ A150, A160, A180, A200
✔ B150, B170, B180, B200

⚠️ Health & Safety Tips

Disconnect the battery before working on the HVAC system

Beware of sharp plastics under the dashboard

Do not run the blower with exposed wiring

Always test the resistor AFTER replacing the fan

Use quality replacement parts to avoid overheating issues

🛠 Recommended Parts & Tools

Blower Motor (W169 / W245 compatible) - https://amzn.to/3XBVjjc

Heater Resistor Pack - https://amzn.to/4rzohOf

Torx driver set - https://amzn.to/443jxqm

Trim removal tools - https://amzn.to/3KmRrj9

Flashlight / inspection light - https://amzn.to/4pNZqou

📢 Affiliate & Work Disclaimer

This video contains affiliate links which may earn a small commission at no extra cost to you.
Any repair, maintenance, or modification shown in this video is done entirely at your own risk.
The creator accepts no responsibility for injuries, damage to your vehicle, electrical faults, or incorrect use of tools or parts.
If unsure, always consult a qualified mechanic or auto-electrician.

🔖 Hashtags

#mercedes #w169 #w245 #aclass #bclass #blowerfan #heaterresistor #hvacrepair #carrepair #DIYmechanic #autocare #maintenance

Please consider a donation if you find my videos helpful.
paypal support link https://www.paypal.com/donate/?hosted_button_id=BGPJ8W42GMU3W

In this video I have this Mercedes B class w245 and I will be replacing the blower fan as it keep blowing the resistor that controls the fan.
The fan has developed a some sort of resistance when turning and as a result it blows the resistor after a few days of use.
#blowermotor #mercedesaclass #mercedesbclass #w169 #w245 #mercedesblowermotor

Hochgeladen am 19.02.2021   Problem melden   Dieses Video bei YouTube   DaringBeefcake bei Youtube