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1997 Nissan Altima Heater not working

Tiny
NOMESHWARARAO
  • MEMBER
  • 1997 NISSAN ALTIMA
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 111,800 MILES
My a/c is working fine when I am putting in the heater it is not working
Sunday, December 9th, 2007 AT 11:44 AM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

with engine warm up, check the temp of both heater hoses with the temp on high. If not hot to touch, you may have a blocked heater core or a faulty heater tap. If both hot the venting system flaps could be stuck closed.

Mark (mhpautos)
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Sunday, December 9th, 2007 AT 4:10 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
The #1 reason a heater will not work is low on coolant, check out this video which should help.

https://youtu.be/SNRb6pSwYuU?si=hhuW4N24wcjf3YUq

Please go over this guide and get back to us.
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Saturday, August 3rd, 2024 AT 6:39 PM

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