My heater fan stays on soon as i turn the ignition on . The display shows that the fan is off but the fan is still running . Even if i push the off button the fan still runs

SOURCE: 2001 Kia Optima over heating

I figured this out and fixed it on my 2001 Optima. Mine was an electrical problem, not an overheating problem. The problem shows up when there is a heavier than normal load on the electrical system. For most of us, this is when the air conditioner is running full-blast on a hot summer day. However, it was also occuring when I ran the heater full blast. The heater running full-blast should have lowered the temperature, not raise it. So I tested the coolant temp while the gauge was showing it overheating. The coolant temp was not increasing, but the gauge showed that it was. It is caused by a bad ground connection. Another test you can do to see if your problem is the same as mine is this. As soon as the engine is showing overheating, pull over, park the car and turn off the engine. Immediately start the engine again and see what the temp gauge shows. If it still shows hot, you'll know you've really got overheating coolant. If it goes back to normal range, you'll know it's just a bad ground connection. Turning off the engine eliminates the resistance in the electrical system that has beeen building up and causing an erroneous high temp reading.

To fix: Either find and clean ground connections throughout the vehicle until it fixes it, or do what I did. A mechanic at the Kia dealer showed me this. I ran a new wire from an empty bolt-hole on the top of the engine to a bolt into the frame behind the engine. I only added a 6 inch wire and a new bolt into the top of the engine. The bolt into the frame was already there, so I just removed it, put the wire under it, and replaced the bolt. It created a redundant ground that prevented the build-up of resistance that caused the erroneous temp reading. It was a 5 minute fix and it has never done it again. Kia knows about this problem and they put out a post to their shops on how to fix it.

SOURCE: acura vigor 1992 motor fan runs after ignition is

Hi I am Vortash sounds like a shorted radiator fan sensor or temperature sensor I would go with the radiator switch first hope this helps Vortash

Marvin

• 85242 Answers
• Posted on Nov 03, 2009

SOURCE: clicking noise when fan heater is running

u are going to have to replace the heater fan motor, it has a bad bearing.

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SOURCE: 2005 Kia Sorento heater doesn't work after battery died

you may of blown a fuse- this can happen if when you jumped it you had the wires backwards - it causes a voltage spike and can blow fuses

SOURCE: cooling fan continues to run after turning off

For how long does the fan run after you remove the keys from the ignition?
It is cooling your system... but for how long. Too long will drain your battery. There is an sensor on the engine that activate the fans. If the fans are running more than 3min, change that sensor. Also check to see if you have enough antfreeze in the system. If not enough.. the cool fluid won't reach the sensor to signify that the system is cool.
Check fluid first, then the sensor