Question about Cars & Trucks
The temp. gauge is @ the half way mark, so normally it would be toasty in cab in no time.but pumps out only cold air until car is moving, then air is only a little bit warm NOT hot.as soon as we stop or put in park and idle, cold air starts again.within last 7-8 months had all fans for cooling system replaced, radiator was replaced due to crack, and engine has kept coolant at normal levels.but my "low coolant" light has been on whole 7-8months so cant tell by that...
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Posted on Jan 02, 2017
I think you could be right about there being air trapped in the system.
Or the heater core(radiator) is plugged.
Either way you need a pressurized radiator coolant pump to put the coolant in without air being trapped.
Although,i have seen it done by jacking the vehicle up high enough that the radiator was now higher than the heater core level, and then the coolant was put in.
But this is dangerous to try.
Posted on Jan 29, 2009
Hello,it seems your car wont stay warm while driving, this is going to be a rather easy and inexspensive fix the thermostat is going to be stuck open. You need to replace the thermostat. Thank You
Posted on Feb 22, 2009
SOURCE: heater blowing cold air
My 2005 Nissan Sentra 1.8s with 55,000 mi. blows cold air from the heater. Coolant not circulating in engine. Lower hose stays cool to touch. Both heater hoses cold. Changed thermostat - didn't fix it. Coolant not leaking or dirty. None in oil - no oil in radiator. Changed worn water pump belt - pump spins freely with no noise or resistance. Cooling fans come on after warm-up. Temperature gauge stays in normal range then jumps to hot and back again. Coolant good to 10 below - didn't freeze here yet. No other problems or repairs to car. Afraid to drive and make worse. Help!
Posted on Oct 16, 2009
sounds more like the thermostat may be failing. generally a water pump starts leaking out of the "weep" hole in the casting before it quits. just look at the front of the water pump for a greenish streak or an obvious leak.
if you also suspect you heater core may be getting plugged now would be a good time to back flush it to get rid of some of the gunk.
Posted on Oct 22, 2009
Tips for a great answer:
Jan 27, 2016 | 2000 Chrysler 300M
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Jun 06, 2014 | 2003 Chevrolet Monte Carlo
For car running hot and overheating issues, I suggest to you go
through this help links.
Click this link below and go through the
troubleshooting procedure to take care of the problems: ----
Car runs hot?
All types of car overheating problems and
Car freeze overnight and started overheating while driving?
Engine Overheats and heater blowing cold?
Car overheats and Air blows hot at idle?
Car engine Overheats and transmission starts slipping?
----------This details will help.Thanks.
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