NP blowing fuse and relay

[vin05]

Hi Guys, Having a problem with my NP so to use the ac or heat will blow the fuse 10a and the relay 20a/ 12v under panel of driver side, at the 4th setting. Also the relay with get warm on the other settings. Also resistor doesn't heat up at all with the ac at any setting but does heat up very quickly with the heater on any setting.

If any one has any ideas or had this problem would be greatly appreciated any advice.

[disco stu]

I gather the fuse and relay are for powering the fan-would that be correct?

Relays seem to get warm just through being used, but I've never checked on these ones in particular.

When you say resistor-do you mean the resistor for the fan?

It sounds to me like there is an issue with the far, or its wiring

[erad]

The resistor bank in the fan speed control controls the voltage being applied to the cabin fan. At setting 4, the resistors have been bypassed, so the fan is getting the full 12 V applied to it. It seems as if there is too much drag on the fan - probably the bearings of the fan. Pull the fan out and check how freely it runs. Another possible cause of problems is blockage of the airflow. The fan is a centrifugal design, and the characteristics of most centrifugal fans or pumps is such that for low delivery pressures, the airflow will be a lot higher and actually the power demand increases under these conditions. Higher power means more current. However, I doubt that this is the cause - it is more likely to be higher than normal friction which is your trouble.

[vin05]

No fuse or relay blowing

THANKS FOR THE POST'S. SO SO MUCH!


I pulled out the blower fan motor pulled it apart as much s I could and put some bike chain
lubrication on the shaft spin it every so often through out the dat.


Then put it back in DOES NOT BLOW THE 10a FUSE ( even with a 5a fuse) DOES NOT BLOWER
THE RELY!!!!!!!! NO WORRY'S AT ALL!!!!!!!

THANKS SO MUCH FOR THE ADVICE!

[Two Emms]

Thank you for posting the solution.

The next person with this problem will search the forum and read
1 what the problem is
2 how you fixed it

You are officially a helpful contributor

[disco stu]

Good to hear. Erad is on the money once again

[erad]

DiscoStu: You had better not make posts like your last one here, or I will have to go out and buy a new hat because my old one won't fit any more. I am pleased that the fan now works. The OP will probably have to keep squirting more lube on the shaft because it will probably jam up again. Not a problem because he knows what to do and how easy it is to do.