Q: Blower fuse gets HOT!!

asked by on

My trucks blower fuse keeps getting so hot it's melting the solder out of the outgoing end of the fuse but not blowing the fuse. It has gotten so hot as to have melted the plastic around the fuse holder. I have replaced the blower motor, the fuse panel, and tried using a busman 20 amp circuit breaker to replace the fuse but even it is getting hot. Please help!

My car has 76000 miles.
My car has an automatic transmission.

Hi there. Which side of the fuse is getting the heat? Does it stay hot all the time? It is highly recommended to not install a higher rated fuse as this may cause system damage. If it’s the blower circuit side, there is excessive amperage draw on that side of the circuit. If it’s on the power side, then that is the side with the excessive amperage draw. On the power side, use a digital volt/ohm meter to perform a voltage drop test and see if there is excessive voltage drop. If there is excessive voltage drop, there is a resistance concern on that wire; it could be corrosion or a breakage in the wire. Perform voltage drop tests on the blower circuit wires and correct as necessary. The blower resistor could also be a source of the hot fuse concern. The blower resistor changes the resistance of the circuit based on fan speed selection prior to power getting to the blower. A fault in the resistor may be causing an excessive draw. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with an electrical problems inspection.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Blower fuse gets HOT!!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 280Z and I want to swap an engine with a 1UZ-FE. How much will it cost to swap?

Billing question sent to CS for the cost of swapping an engine out on a 1976 Nissan 280Z.

Q: How do I program the HomeLink garage door opener for non-rolling code garage doors?

Garage doors that were made before 1996 are referred to as non-rolling code. Here is how you program them with your HomeLink garage door system. Insert your key into the ignition, and turn the ignition switch to ON/RUN. Locate...

Q: I got a 1976 Chevy truck 350,it's runs good when gets hot it the shuts off, when it cools it runs again, what could the problem be?

It sounds like what you are describing is a classic sign of a failing ignition coil that may be getting too hot to operate properly and is going through a heat cycling phase. Ignition coils are made of a varnish...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...