The other day i started my 99 max se and turn the heat on as usual. I went back inside and when i came out 10 minutes later the fan for the heat was blowing, but cold air was coming out. I took a look at my temperature gauge and it was reading that the car was warmed up. I then started driving and once i began to acceleratek, hot air was coming through my vents. This is driving me absolutely insane. I hope i don't get stuck in traffic. Can anyone help me with this problem.

 

Check your coolant level. It's probably way low.

 

my car did this when the thermostat crapped out

 

change ur thermostate... same thing happend to me..

 

Yup! Change your t-stat, with a Nissan one from Nissan! Do not get one from Autozone or some other POS part store unless you want to change it again in 6 months. Do it once, do it right.....

 

Nissan one was cheaper than autozone, kragen, or pepboyz here.
Jae

 

does the collant have anything to do with it??

 

i got one from advanced auto parts, working just fine no problem, all the delicious heat I can hangle, i was being cheap @ the time plus had emissions.

 

Wait 6 mos, you'll be changing it again, if not sooner.....

 

its almost 6 months now, dont see I'll need to change it fit well, felt quality, we'll see.

something like that happen to you?