Login  |  Register
Nissanhelp.com - All About Nissan
All Models, All Years 2014 370Z Coupe 2014 370Z Coupe Nismo 2014 370Z Roadster 2013 Altima Coupe 2014 Altima Sedan 2014 Armada 2014 Cube 2014 Frontier Crew 2014 Frontier King 2014 GT-R 2014 JUKE 2014 JUKE NISMO 2013 Leaf 2014 Maxima
2014 Murano 2013 CrossCabriolet 2013 NV Cargo 2013 NV Passenger 2013 NV200 2014 Pathfinder 2014 Pathfinder Hybrid 2014 Quest 2014 Rogue 2014 Sentra 2014 Titan Crew 2014 Titan King 2014 Versa Note 2014 Versa Sedan 2014 Xterra Concept Models
MyNissan Do-It-Yourself Maintenance Owners Manuals Recalls/Campaigns Service Bulletins Service Manuals Tech Challenge Game Nissan OBDII Codes Glossary & Acronyms Cost Estimator More...
Member's Ride Photos Stock Photo Gallery
Classifieds - For Sale Classifieds - Wanted To Buy Classifieds - Mechanic Wanted Classifieds - Auto Services Search Auto Parts Ultimate Reflector Auto Sun Shades Custom Fit Car Covers Auto Snow Shades Berber Auto Mats Coco Auto Mats Designer Auto Mats Diamond Plate Auto Mats Fashion Auto Mats Flexomats Auto Mats Hexomats Auto Mats
Register FAQ Social Groups Mark Forums Read
Forums Nissan Models Altima Heater is blowing luke warm
Forgot Password? Join Us!


Altima Nissan Altima Sedan Discussion Forum

User Tag List

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 12-16-2011, 09:49 AM
dtalley14's Avatar
Registered User
2002 Altima
2009 Altima
 
Join Date: Dec 2011
Posts: 7
Thanks: 2
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default Heater is blowing luke warm

I have tried doing the air from the radiator thing twice got a lot of air bubbles from doing so, but now my heat is back to luke warm and when i turn my defrost on it blows cool air. What do i do
Reply With Quote
  #2 (permalink)  
Old 12-16-2011, 12:19 PM
DCARLTON's Avatar
Tech Enthusiast
1995 Maxima
2002 Altima
1997 Maxima GLE
 
Join Date: May 2008
Posts: 264
Thanks: 0
Thanked 25 Times in 23 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

So you've done the procedure. When you completed the procedure, did you get hot air coming from the vents? Do you get hot air from the vents when you drive the car? What does your temp gauge show? A little less that half (and I do mean a little)? How full is the radiator? How full is the reservoir?
If you get heat when driving, but not at idle, you potentially still have air in the system. If you never received hot air out of the vents during the procedure, you might have not gotten all the air out of the system. If your radiator is not full and/or overflow reservoir doesn't contain fluid, then you might have air in your system and still getting air into the system from the reservoir. If your temperature gauge never gets to almost the half way point, then you may have a bad thermostat stuck in open (better than stuck in closed).

Lots of questions and lots of possibilities.

When you turn defrost on, it should blow cold air as it comes from the AC system, however, it also should mix with hot air off of the heater core assuming that you have the temperature setting on the hot side. I suppose it's possible that there could be an issue with a door that isn't operating correctly where it never switches to let the heat in from the heater core.

I suppose also you could have a plugged heater core. Plugged heater cores and bad thermostats on Altimas aren't a common problem but we all treat our cars differently and anything is possible.
__________________
1995 Maxima SE (313,000+ miles 10/2012)
1997 Maxima (193,000 miles - bought from daughter when she traded for a Hyundai Elantra Coupe)
2002 Altima (daughter - totaled 12/2011 with 210,000 miles)
2012 Altima (daughter - replaced 2002 with 8 miles, now with almost 30,000 miles)
Reply With Quote
The Following User Says Thank You to DCARLTON For This Useful Post:
dtalley14 (12-16-2011)
  #3 (permalink)  
Old 12-16-2011, 12:41 PM
dtalley14's Avatar
Registered User
2002 Altima
2009 Altima
 
Join Date: Dec 2011
Posts: 7
Thanks: 2
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

Yes when i performed the procedure i was getting hot air from the vents and i was like whew problem solved but a couple of days later it was back to luke warm air. I have been told it could be a thermostat but it also could be that i didnt have it elevated enough when i did it as well. the antifreeze is full in the radiator
Reply With Quote
  #4 (permalink)  
Old 12-17-2011, 12:29 PM
streamcast's Avatar
Master Enthusiast
1997 Altima
1995 Sentra
1995 Nissan sentra
 
Join Date: Jan 2009
Location: CANADA
Age: 44
Posts: 1,225
Thanks: 6
Thanked 46 Times in 44 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

I am assuming this is for the 2002 altima. If so do the engine run slightly rough on cold startup. You have air intrusion into the cooling system.
1. swollen seal on rad cap
2. aluminum crimps on rad not sealing.
3. Head gasket not sealing. May see this by removing sparl plugs, if white poss indication.
I hope this helps
Reply With Quote
  #5 (permalink)  
Old 12-19-2011, 04:25 AM
DCARLTON's Avatar
Tech Enthusiast
1995 Maxima
2002 Altima
1997 Maxima GLE
 
Join Date: May 2008
Posts: 264
Thanks: 0
Thanked 25 Times in 23 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

If you got warm/hot air after doing the above procedure, then you probably did it correctly. You say the radiator is full but how about the reservoir? In the past, when I've done this, I've over filled the reservoir to insure that any air in the system is replaced with coolant from the reservoir.

My suggestion would be to do the procedure again, raise the front of the car as much as you can (2 or more feet is good), do it exactly as above (or look on youtube for a video, check this link out - Altima No Heat ). Also, I remember too that if you can hear what sounds like a sloshing noise in your dash when you turn a corner, this is a good indication that there is air in the system.

In the video, this guys uses an external reservoir instead of using the Altima's reservoir. Most of us don't have these, and why make a jug as he suggests when you can use your own reservoir sitting right there at the fender.

This video is excellent on how to correct this problem

Good luck!
Reply With Quote
  #6 (permalink)  
Old 01-16-2012, 03:46 PM
tonyguy's Avatar
Registered User
2005 Altima
 
Join Date: Jan 2012
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

2005 Altima here with heater issues....
I have read the threads, performed the procedure to remove air bubbles.... no luck.

Symptoms are similar:
1. Warm to cool heated air at idle.... even with temp gauge reading 1/2 and having set off elec cooling fans... AC off.
2. With engine rpm at 2500 parked, you can not sustain holding your hand in front of the vents at max fan and max temp. Plenty of heat!!!!!
3. WHile performing the procedure and massaging the upper radiator hose and poking around under the hood, I discovered the following....

The heater hose coming from the top of the engine (at the upper radiator hose connection) is very hot (cannot hold the hose for any length of time) WHILE THE RETURN HOSE (to the lower radiator hose boss) IS ABSOLUTELY COLD, NOT EVEN WARM. (Work done while 15 F outside). The hoses have plenty of sag in them, and I raised them and squeezed them with no improvement.

It would appear that the water pump, located on the lower hose, has to pull the hot water from the top of the engine, thru the heater core, and downward to the lower engine connection and the lower radiator hose connection.

SO I am thinking (mind you I don't have a repair manual, my girlfriend's car) the water is not circulating through the core. Potential causes:
1. Kinked hoses, plugged hoses (They look good, factory original)
2. The hoses are reversed and that matters for some reason (doubtful, but don't know if there is any check valve for some reason - (passenger side connection is off the upper radiator hose)
3. The heater core is plugged up - coolant looks nice and clean, (may disconnect the heater core hoses at the block and flush with hose in the opposite direction of flow) in an attempt to test for restrictions, debris, but temp valving may interfere (see next item)
4. I don't know if this is the case... in the older vehicles, the temp control was directly connected to a mechanical valve, by a cable, which regulated the throughput of the water flow through the core... can anyone verify a flow restricting valve is used with the 2005 Altima in lieu or outside air mixing???? If so, the valve may be suspect (electric or vacuum controlled). Haven't dived under the dash yet to look for it.... any thoughts????

I need to score some points with the girlfriend, she has a remote starter, but it almost useless under the circumstances. She reports it hasn't worked in ages as best she can recall. Original owner, no major mechanical issues or body work.

Thanks in advance for the thoughtful and well crafted advice.
Tony
Reply With Quote
  #7 (permalink)  
Old 01-16-2013, 11:10 AM
coreyand1's Avatar
Registered User
2004 Altima
 
Join Date: Jan 2013
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

Help, I have the same problem. Pressure tested the system twice, shows no leaks head gasket appears to be good. Replaced radiator, bled system, replaced cap and air is still getting in coolant.
Reply With Quote
  #8 (permalink)  
Old 01-16-2013, 11:17 AM
DCARLTON's Avatar
Tech Enthusiast
1995 Maxima
2002 Altima
1997 Maxima GLE
 
Join Date: May 2008
Posts: 264
Thanks: 0
Thanked 25 Times in 23 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

Make sure the overflow reservoir ALWAYS has coolant in it. If it ever runs dry for any reason, air will be introduced into the system and you will eventually get no heat.

If you have bled the system correctly and all air has been removed but you still get cool air at idle and hot air when driving, you still have air in the system.

If you elevate the front of the Altima when bleeding the system (the higher the better - ramps of 1.5-2 feet are best), it insures the air seeks the higher level and escapes from the cooling system. Google search Altima and cooling system or search youtube for videos.
Reply With Quote
  #9 (permalink)  
Old 01-16-2013, 11:20 AM
coreyand1's Avatar
Registered User
2004 Altima
 
Join Date: Jan 2013
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

Thanks Dcarlton, we have done that multiple times. It seems there is a small leak somewhere even though the pressure test says otherwise. There is an antifreeze smell when the car is very warm although it appears to be coming out the vent at the top of the reservoir.
Reply With Quote
  #10 (permalink)  
Old 01-17-2013, 07:21 AM
DCARLTON's Avatar
Tech Enthusiast
1995 Maxima
2002 Altima
1997 Maxima GLE
 
Join Date: May 2008
Posts: 264
Thanks: 0
Thanked 25 Times in 23 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default

I really hate cooling issues......

On my Maxima, I had a faulty radiator cap that would allow a fine mist when pressurized and of course the mist would be dispersed by the fans and you would never see the leak.

The little ones are the tough ones until they get bad enough that you can actually find them.

Good luck to you!
Reply With Quote
Reply

Bookmarks

Tags
blowing, heater, luke, warm

Thread Tools
Display Modes

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 -8. The time now is 02:54 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.0
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.