Question about 1999 Chevrolet Blazer

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I have a 1999 Chevy blazer my blower is not working no hot or cold air had a heater core put in does this have any thing to do with

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 5 Answers

SOURCE: 1996 chevy s10 heater not blowing hot air

heater core or leak on cooling system

Posted on Jan 06, 2009

  • 1 Answer

SOURCE: no heat

what if both hoses are hot. and on idle heat comes on but driving it's blows co

Posted on Jan 24, 2009

  • 217 Answers

SOURCE: '98 S-10 heater blowing cold air - not hot air

will the air flow switch from floor to the mid to defrost? if so then we have a problem with the tempature door actuator. easy to replace just in tight place. Keep me posted for more help or if this was any help thanks

Posted on Jan 31, 2009

Tech jk
  • 102 Answers

SOURCE: my heater stoped blowing hot air.antifreeze level

If the blower is blowing air just fine, but you cannot control the temperature, you need to listen to air coming from the vents while turning the temperature from hot to cold. If you do n ot hear any change in airflow, then you may a temperature door in the dash broken. this is becoming a common problem on the Equinox and Pontiac Torrent,

Tech JK
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Posted on Oct 15, 2009

  • 2841 Answers

SOURCE: 1989 chevy silverado heater blowes cold air. both

Feel the hoses going into the heater on the firewall. If one is hot and the other is cool, then the heater control valve is not working for whatever reason. Check the flow valve.

Posted on Nov 07, 2009

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1 Answer

1998 chevy blazer heater core replacement


under the hood to the far left corner you must cut the plastic cover open to expose the blower motor. remove the screws that hold the blower in place, pull the blower through the hole.

Mar 01, 2014 | 1999 Kia Sportage

1 Answer

Why is heater not blowing hot air on 99 chevy blazer


if the fan blower is working then it must be the heater valve inline with the heater hoses. Or the selector on the dash has broken and is not connected at the back. You have tried everything else. You were correct in what you wrote above and have tried so far

Nov 21, 2012 | 1999 Chevrolet Blazer

1 Answer

My heat is not working on my 2000 S-10 Blazer


if the heater core is good, the hot -cold switch usually located in one of the heater hoses could need replaced or the cable is bad going to that valve. If it is stuck in closed position, you will get no heat

Oct 29, 2012 | 2000 Chevrolet Blazer

2 Answers

98 chevy blazier There is no heat coming out but the blower is working fine.


HI. PLUGGED( HEATER CORES) ARE A COMMON PROBLEM. WIITH A WARM ENGINE FEEL BOTH HEATER HOSES, IF ONE IS HOT AND THE OTHER COLD SUSPECT HEATER CORE. ALSO MAKE SURE YOU ARE NOT LOW ON COOLANT. THANKS AND GOOD LUCK MOTOR62500.

Dec 20, 2010 | 1998 Chevrolet Blazer

2 Answers

My 99 Blazer won't blow hot air. The Heater core


The problem was a vacuum line leak. Replaced the line.

Dec 30, 2009 | 1999 Chevrolet Blazer

1 Answer

Why wont my 99 chevy blazer temperature warm up?


You may have vapour lock in your heater lines. Start engine, put heat lever on high, disconnect one of the lines on your heater core, the one on the flow out side, & see if you have any air coming out. Once antifreese comes out stick line back on & retighten clamp. Make sure your cooling system is topped off. Also your water pump may not be functionihg to it's maximum. Take rad cap off cold & view flow rate. If inadequate you may have to replace the water pump. Good luck!

Dec 09, 2009 | 1999 Chevrolet Blazer

1 Answer

99 chevy blazer blows hot air


blend door actuator open to the heater core and stuck i had the same problem and repaired the cracked gear.

Jun 08, 2009 | 1999 Chevrolet Blazer

3 Answers

No Heat! 1999 chevy blzr lt 4.3 radiator full, blower works,


Your '99 Blazer does not have a water valve. Just a temp. blend door. In other words, hot water should be flowing through the core at all times. Like the other techs said, make sure you are getting the whole system full of coolant. You might even try disconnecting one hose, and pouring water into the heater core itself. On most of these year models, if you listen, you can hear the rush of water through the core when you lightly rev the eng. I have replaced 3 heater cores just last year on '96-'99 Blazers. They clog easily. YOu can blow or flow water through them, but if they don't flow freely, I mean without any restriction whatsoever, they will not get as hot as you want. The thing is tiny!

Here's an easy test: Run engine until temp gauge reaches normal: around 180-200 degrees. Reach back to the firewall and grab both heater core hoses. Are they both about the same temp. and HOT? THey should be. If one is much warmer than the other. You are clogged enough to suffer in the winter. And from what you said: "Brrrrrr" You are getting poor performance out of your heater.

BE sure to check that the blend door is working. Is it cool when you set temp to cool? Blazers go through way more heater cores than they do blend doors, so I'm betting your core is either empty, or clogged. TaterTodd

Jan 25, 2009 | 1999 Chevrolet Blazer

3 Answers

My 1999 chevy blazer will not blow heat


ther are two small tubes that open and close the valve to let in the hot air' one is from right under the carb intake and goes to the right (looking at the engine) right behind the fuse box. if there's o hole in that tube the heat will not work. just change mine becase the tube dry-rotted

Jan 08, 2009 | 1999 Chevrolet Blazer

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