Heater blows cold air while idling but hot air when driving. Why?

Asked by carlwinslow Feb 25, 2014 at 04:57 PM about the 2004 Nissan Titan XE King Cab 4WD

Question type: Maintenance & Repair

My 2004 Nissan Titan heater blows cold air while idling but hot air when driving.  At first it
would only blow cold air but I found that the coolant level was low - I believe I have a slow
leak in the upper part of the radiator.  After filling the radiator, I could get hot air but only
with the engine revving or while driving.  Any ideas?

1 Answer
2,935

HECTORINTUCSON answered 10 years ago

If your water level goes low your heater will pretty much work when the engine rpm's are high I can suggest stop leak on the radiator how ever when you fill it up with coolant or water the engine has to be cold start it and keep adding the fluid to make sure all the air pockets come out

7 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Shortcuts

Search Nissan Titan Questions

CarGurus Experts

  • #1
    Robert Lavallee
    Reputation
    2,310
  • #2
    THS
    Reputation
    980
  • #3
    Wendt
    Reputation
    850
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
321 Great Deals out of 15,103 listings starting at $1,712
Used Toyota Tundra
34 Great Deals out of 1,190 listings starting at $8,500
Used Chevrolet Silverado 1500
195 Great Deals out of 5,967 listings starting at $2,975
Used Nissan Frontier
20 Great Deals out of 879 listings starting at $5,998
Used GMC Sierra 1500
143 Great Deals out of 7,206 listings starting at $3,950
Used Toyota Tacoma
57 Great Deals out of 1,080 listings starting at $8,708
Used Ford F-250 Super Duty
24 Great Deals out of 1,201 listings starting at $8,995
Used Chevrolet Silverado 2500HD
18 Great Deals out of 1,279 listings starting at $9,990
Used Dodge RAM 1500
4 Great Deals out of 73 listings starting at $4,000
Used Nissan Armada
4 Great Deals out of 180 listings starting at $6,999
Used Chevrolet Colorado
25 Great Deals out of 1,496 listings starting at $6,800
Used Toyota 4Runner
12 Great Deals out of 309 listings starting at $9,700

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.