1999 Chrysler 300M heater blows cold cold when car is stopped?

Question

my wifes 1999 300m heater works good when driving but when you stop at a light the air changes from hot to cold in about 10 seconds

Answer 1

YOUR COLLANT IS LOW

Answer 2

confident it would desire to be many stuff. The coolant point might desire to be low, the heater administration valve might additionally be a controversy (in the experience that your motor vehicle even has one, no longer all do! we don't even comprehend what automobile it is, be careful with your solutions.) additionally so a techniques as your vaccum leak is in touch. Your HVAC gadget would possibly no longer place self belief in vaccum. If it does, under acceleration is once you have a drop in vaccum no longer at idle. you will have the main idle under engine braking situations and the least under difficult accelerations. Idle could fall interior the midsection. At idle your engine must be pulling secure vaccum of roughly 15lbs or so under general healthful situations. So throw that answer out it isn't any solid.. In my own opinion, according to adventure, i could urge you to first check out your coolant point and from there check out changing the thermostat. this is not costly and interior the previous approximately 12 years I even have seen this be the reason of this undertaking a solid ninety% of the time a minimum of. desire this gives you some practise.

Answer 3

TWO WORDS.........HEATER CORE...........Don't sit there and mess around. Just change it. Our two cars did that too and we started out just being like okay jets start out with this and that. Okay what you do is flush your system out. then check to see if it works. If not just change the heater core!

Answer 4

your high speed relay switch is bad.

Answer 5

check your thermostat