climate control fan high speed operation only

[JMeade]

Has anyone heard of a problem where the c/c fan only works on the highest speed manually set?? Please help!! Otherwise, all other a/c and heat systems working fine. Just happened starting yesterday!

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[Lud]

Do you have a '91 or early '92? If so this may apply:

 

[muskovich]

Just happened to my '92. I see that there is a solution via the dealer but it looks like it may be expensive unless they goodwill it; but on my '92 I doubt it. I will be researching a DIY option and will keep you informed. Appreciate the same! Good luck!

 

[NSXTC]

I have recently developed this problem on my '94. Any other ideas?

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All My NSX'es Live in Texas

 

[winreboot]

I got the same problem. Blower stays on high eaven after the car is turn OFF. If any one finds the specific solution PLEASE help and share it

 

[NosNsx]

I bought a brand new transistor and replaced it and it wasn't the problem. I heard the problem is that the ac climate control unit brakes a couple of capacitors and this is the problem it cost like $75 to fix. Me and my friend had the same thing happen to us the ac only blowing on high and he got a climate contol unit from the junkyard and bam it works fine, he never replaced the power transistor.

 

[winreboot]

I see. But in my case the blower works fine when engine is turned on. I can change the speed of the blower and it is working fine.

When I turn the car off the blower shuts OFF then like in 5seconds it turns on blowing very HIGH. This is with the car turn OFF and the ignition key out.

 

[winreboot]

OK, my problem is fixed.

It was those pesky relays

I guess after 10 years all the humid and weather corode them. I had 3 relays go bad at the same time. This was after a havy rain. I replace them and everything is fine now

 

[NosNsx]

What relays? Did you take out the climate control unit and got it fixed, was it the capacitors that were blown?

 

[winreboot]

There is a black rectangular box next to the blower. There is a low fan relay, blower relay and blower high relay. All I did was remove the realay and seen like a GREEN stuff under the relay. Then I open up the relay and I seen coroded coil and little moisture in it. I went to HONDA dealer and they wanted $14 for each relay.

$14 bucks for stupid rely was a little much for me so I went to juck yard and take out like 10 and replaced my all relays

for $10 Accord, Prelude and Civic share same relays.