Jump to content

280ZXT a/c fan.......WEAK


Recommended Posts

So the fans in the climate control system of the 280ZX's have always sucked, or at least in the 3 I have owned. Wondering if there's an "upgrade" to make more than just a slight breeze come out of the vents. Just doesn't cut it here in Phoenix in the summer. Having the thing turned up all the way is equal to about the number 1 setting in my Frontier.

Link to comment
  • Replies 14
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

1970-78 fans are much weaker than the 1979-83.


If your fan is that weak maybe just replace the blower motor itself with a used stock unit. The relays are different on the manual control fan motors so try to get one from the same system.

Link to comment

You could check to see that there are not vacuum line leaks. Also, there is an electric vacuum pump that may not be working properly.


I removed the electric pump in my ZXT, so now if I'm in boost, or near 0 psi vacuum, I don't get any flow. :o I have a auto climate converted to manual.

Link to comment

Ohhh, I have never gotten any flow at/near positive boost. Didn't realize there was an additional vacuum pump for the HVAC. I have checked the system for leaks though using a mityvac, seemed to be fine. Will have to look into that. I assumed that those vacuum canisters under the hood were designed to hold enough vacuum under boost. Mine is an 81' if it makes a difference.

Link to comment

i have also found that the vacuum actualtors can be an issue. they are the part that controls the flapper doors. if they have a sticky spot they wont open all the way causing poor flow. have the car running or your pump hooked up, remove the dash and watch to verify that all the actualtors are moving full sweep. having the dash out makes it easy to see them all. its pretty hard with the dash in.

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.