heater blows cold at idle - Maxima Forums

Go Back   Maxima Forums > Maxima Discussions > 4th Generation Maxima (1995-1999)

4th Generation Maxima (1995-1999) Visit the 4th Generation forum to ask specific questions or find out more about the 4th Generation Maxima.

heater blows cold at idle

Thread Tools Search this Thread
Old 01-13-2007, 08:51 AM   #1
Join Date: Sep 2005
Posts: 36
heater blows cold at idle

Hey there, that is pretty much the symptoms, if I go and warm up the car in the morning, it doesn't matter the engine temperature, it can be completely at operating temp and it still blows cold, until I bring up the rpms to about 1500 or just start driving. When I am driving it is fine and blows warm, but when I stop at lights it blows cold again
Let me know what you think
chinaman is offline   Reply With Quote
Old 01-13-2007, 10:21 AM   #2
Senior Member
iTrader: ( 4 )
Join Date: Feb 2005
Posts: 1,805
prestone flush. prob clogged as hell and no coolant is getting through until the higher rpms push it through. better do it now before it becomes a blockage and a flush is no longer an option.
2da mizzax is offline   Reply With Quote
Old 01-13-2007, 10:43 AM   #3
sky jumper
Posts: n/a
1) start by verifying that the heater core valve is opening. if it opens then

2) purge any air from the system...

3) if that doesn't work you probably have a clogged heater core and a "standard" chemical flush (just pouring stuff into the radiator) probably will not fix it...

before you tear out the heater core though, your could try to open the heater core lines and attempt to directly force flush it with a high concentration of the flushing chemicals. it might work, but I think your chances are low.

whatever you do, follow this advice (esp coolant type and purging air) ...
  Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
air stuck on heat even when set to cold? tarun900 4th Generation Maxima (1995-1999) 17 02-28-2016 03:45 AM
FL One last grounding kit + big three! Black with Red hot lead wire Shinjiduo 5th Generation Classifieds (2000-2003) 14 11-23-2015 09:37 AM
Rough start (takes multiple cranks) TKHanson 5th Generation Maxima (2000-2003) 3 10-07-2015 04:47 PM
car overheating Miket2006 6th Generation Maxima (2004-2008) 1 10-05-2015 07:19 AM
Block Heater howardis 8th Generation Maxima (2016-) 5 09-30-2015 09:38 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT -7. The time now is 10:56 PM.

Maxima.org Forums Home Here you can view your subscribed threads, work with private messages and edit your profile and preferences Frequently Asked Questions on the Forums Search Find other members Registration is free! Support Maxima.org! Receive perks and benefits by donating to Maxima.org Questions? Comments?  Suggestions? Contact Us! Visit our Sponsors View and submit Maxima events Log Out of Maxima.org