HVAC blower issues

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Oct 1, 2012 | 11:41 PM

#16

cutlass

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Quote:

Originally Posted by 429 f-100

if one of my vents are closed it makes that high pitch wine sound make sure all are open. x2 on resistor high is a bypass straight thru.

I hate to admit it... the vents were all closed. Yes, I do feel silly now.

Oct 1, 2012 | 11:53 PM

#17

empiretc

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Quote:

Originally Posted by cutlass

I hate to admit it... the vents were all closed. Yes, I do feel silly now.

That is good news... we NEVER close our vents in south texas, so have never had that problem.

You should be good to go once you change out that resistor!

Oct 2, 2012 | 12:36 AM

#18

1fixitman

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From: Palatka, FL

Quote:

Originally Posted by cutlass

Thanks. It's so strange that a brand new never used one would be bad. Oh well.

There is no way to tell if someone else used that resistor pack with a bad fan or bad switch and burnt up the slower speed resistors and then RETURNED it. There is no resistor in high speed. The other speeds drop the voltage sent to the motor with different size resistors.

Oct 2, 2012 | 01:05 AM

#19

cutlass

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Quote:

Originally Posted by 1fixitman

Could it be that I have a bad switch? I would like to figure that out before I spend money on a new resistor.

Oct 2, 2012 | 07:30 AM

#20

kawcrasher

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From: Eastern Ohio

Check for continuity between the the resistor plug and the motor hot wires in each setting. Also test resistance across the resister itself.

Oct 3, 2012 | 12:55 AM

#21

cutlass

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Quote:

Originally Posted by kawcrasher

Check for continuity between the the resistor plug and the motor hot wires in each setting. Also test resistance across the resister itself.

Sounds like a good idea. I do have a digital multimeter but I'm not sure how to to check for continuity between the resistor plug and motor hot wires and test the resistance across the resistor.

Any advice would be appreciated.

Thanks,
Drake

Dec 15, 2012 | 01:05 AM

#22

cutlass

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OK, I finally figured this problem out. I was just inside the blower motor resistor and noticed that one of the wires wasn't fully seated all the way down into the connector. The tab that holds the wire into the proper position inside the connector was broken. I pushed the wire back inside all the way as it was connected to the blower motor resistor and now it works perfectly. All 4 blower speeds now work!

I wanted to let everyone how this finally turned. It took a while to accomplish, but now it's fixed!

Drake