Question about 1999 Chrysler 300M

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1999 Chrysler 300M, heater blows cold air. Works every once in a while, but blows cold air most often. What do I need to check?

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  • anthony skidmore May 11, 2010

    First check the engine coolant level and top up as necessary.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

jamaicanmech
  • 17 Answers

SOURCE: My 1999 Ford F150 Heater only blows out cold air

guys have you checked for a vaccum leak????? there is a little plastic ball with a vaccum line going to it that controls the outside air coming in. check for a leak in this line

Posted on Jan 08, 2009

  • 10 Answers

SOURCE: 1999 Chrysler 300M heater is

see if any one mess with it and did something that they should not have

Posted on Dec 28, 2010

nvannoy
  • 234 Answers

SOURCE: my 2000 Chrysler 300M Heater

This is most likely due to an empty cooling system. Check the coolant in the radiator (with the car off for atleast 30 minutes). Once you refill it you can see if you have a leak in the radiator or a hose, etc. If there is a bunch of smoke coming out the tail pipe or the oil level is really high, than you have blown a head gasket.

Posted on Mar 07, 2011

  • 239 Answers

SOURCE: 1999 Chrysler 300m heater won't get hot fan

Is there enough anti-freeze in the system?
If so perhaps the system needs bleeding.
On the front of the engine, on top near the big upper hose goose neck and nestled between the runners of the intake manifold is a small nipple that looks like a brake bleeder (10MM). This is a cooling system bleeder, a close cousin to the brake bleeder. When opened it will purge the system of air- likely the culpret you are experiencing. on a cold or just warm engine, this can be slightly opened with a wrench and the air can be "Burped" out. Attach a 1/4" clear hose to the nipple and open the bleeder until you see all the air has left the manifold. (Run the hose into a bucket and dispose of the used anti-freeze properly.)
if that doesn't do it, maybe the thermostat is stuck in the open position. Replace it with a cold engine and use a new gasket each time.
If all else fails, the heater core may be plugged.

Posted on Nov 30, 2011

  • 239 Answers

SOURCE: 1999 chrysler 300m heater blowing only cold air.

Kristi- please look for my proposed fix for this under another users question. If you need further help, let us know.THANKS!

Posted on Dec 01, 2011

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Why is My Car AC Blowing Hot Air? - BlueDevil Products

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Jan 27, 2016 | 2000 Chrysler 300M

1 Answer

Heater not blowing hot air


Sounds like the heater core

Mar 08, 2014 | 1999 Chrysler 300M

1 Answer

Only get cold air from heater


Check whether any hot water flows in the heater hoses which are located between the engine and the firewall .If you to have the feeling hot water and not hot air in the cabin means either you do have blocked Matrix,or the circulation flow valve stuck to cold flow.
* Start the engine first and leave it for 5 minutes running till get to temperature and then check *

Nov 01, 2013 | 2001 Chrysler 300M

1 Answer

Heat blows cold 200 chrysler 300m


Hi Stacy,

There are several things that can cause that. Please read the article at the following link to get a better idea of what needs to be done.

Why Is My Heater Cold?

Dec 24, 2011 | 1999 Chrysler 300M

1 Answer

1999 Chrysler 300m heater won't get hot fan blows but doesn't heat


Is there enough anti-freeze in the system?
If so perhaps the system needs bleeding.
On the front of the engine, on top near the big upper hose goose neck and nestled between the runners of the intake manifold is a small nipple that looks like a brake bleeder (10MM). This is a cooling system bleeder, a close cousin to the brake bleeder. When opened it will purge the system of air- likely the culpret you are experiencing. on a cold or just warm engine, this can be slightly opened with a wrench and the air can be "Burped" out. Attach a 1/4" clear hose to the nipple and open the bleeder until you see all the air has left the manifold. (Run the hose into a bucket and dispose of the used anti-freeze properly.)
if that doesn't do it, maybe the thermostat is stuck in the open position. Replace it with a cold engine and use a new gasket each time.
If all else fails, the heater core may be plugged.

Nov 07, 2011 | 1999 Chrysler 300M

1 Answer

1999 chrysler 300m heater blowing only cold air. Need help to fix the problem


Kristi- please look for my proposed fix for this under another users question. If you need further help, let us know.THANKS!

Oct 09, 2011 | 1999 Chrysler 300M

1 Answer

Heater problem with chrysler 300 m.. 1999 model


check your radiator for water and or coolant first then check radiator cap make sure it is not leaking next you will need to check thermostat if your not handy with tools than take to a mechanic

Mar 02, 2010 | 1999 Chrysler 300M

2 Answers

Heater at times blows cool air and at times works properly. Please help......


try putting a piece of card in front of rad no more than 2/3 the rad area

Jan 12, 2010 | 1999 Chrysler 300M

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