1998 Blazer Heat/AC Problem

Brooklyn, NY

#104 Jun 22, 2012
Where it's the rdo fuse? In the cab fuse box put the one under the hood?

Brooklyn, NY

#105 Jun 22, 2012
Where it's the rdo fuse? In the cab fuse box or the one under the hood?

United States

#106 Jul 1, 2012
I have a 1995 gmc jimmy sle and the vent door does not move, I have removed the glove box an only an small opening in the top left corner, but i can not see the motor, can i cut out the rear housing behind the glove box an access the motor to move it from heat to cool? I was told that i mite be able to do this as i don't wanna remove the entire dash assy.

Manhattan, IL

#107 Jul 15, 2012
I have a 2000 s10 blazer with the 43 in it the problem im having is i canot get any heat. I have replaced the thermostate and heater air computer control and still no heat any ideas whats wrong im stumpped
Jimmy R

Prairieville, LA

#108 Oct 10, 2012
A/C doesn't blow cool air. The compessor isn't running and it won't accept freon.

United States

#109 Oct 29, 2012
Having the same problem with my 98 Blazer. Took out the glove box. How the heck do u remove the actuator? Is it a clip? Or what? Needing heat now. Seems like the actuators for my defrost AND heater are stuck in the closed position! Help!

Boise, ID

#110 Jan 5, 2013
i just got a 98 blazer and i noticed that the floor vent does not blow air when i put it on the floor it comes out the window defrost vent

Pomona, CA

#111 Mar 20, 2013
Have a 2000 Blazer and doing all the same things. Only have heat when you turn temp control to Max, then it goes to mega heat. Between the 60 go 80 lines, just cool air. Any chance its the climate control unit itself? Have not done the glove box inspection yet, blend door etc. Thanks to all.

Pomona, CA

#112 Mar 20, 2013
Jimmy R wrote:
A/C doesn't blow cool air. The compessor isn't running and it won't accept freon.
I had the exact same issue, did lots before I was told to check this small plastic filter, at the bottom of the ac unit at the firewall. Yes, you have to remove the aluminum dryer, its no big deal, and at the bottom of the big black unit, inside, is a white plastic tube with filter material. It will be most likely jammed with crap. You have to have a pick type tool to pull it out, just remember how it came out also. Its about 3" long, is probably cleanable without replacing, remember how it came out so not to put in or try to put back in backwards. good luck!

Columbia City, IN

#113 May 1, 2013
My 98 Blazer has had the heater core replaced. After 3 years it stopped blowing hot air, so we flushed the radiator and flushed the heater core. Heat works great but now I don't have cold air when the air conditioning is on. We have checked the fluids and has plenty of antifreeze. Any ideas why I have no cold air but I have heat?

Mattapan, MA

#114 May 29, 2013
I have had all the same problems. the blend door acutator is relitively easy to replace. if you remove the glove box. then remove the pneaumatic actuator.( it snaps on to a couple of tabs - simple pull it up and remove. on top of the heater core you will see the blend door control gear box. remove the electrical connector. with a 7/32 wrench remove the two hold down screws. there are only two screws. remove the control and then remove the four cover screws. when you open it you will, in all likelyhood see the main drive gear is cracked. they are plastic. putting it back in is a little tricky because you have to make sure the new control finds its limits. i achieved this by connecting the electrical connetor then turning the key to to on position. then make sure the blend door is in the full open or closed position when you reinstall the gear box. it is wise to get the install procedure online before installing the new gear box.


Redwood Valley, CA

#115 Jun 9, 2013
AC blowing thru the defrost only. Cant get it to blow thur the dash. Anybody know what is causing this.
vic sabb

Bronx, NY

#116 Jun 9, 2013
My 1998 ChevyBlazer has not worked in 8 yrs everytime i go to a mechanic they sat it would be 1800 dollarsto remove dashboard and change accuator doors that are broke or stuck. Is there an easier way to approuch this problem?

Glendale, AZ

#117 Jun 19, 2013
swilson wrote:
what's the problem when freon is put in my 198 chevy blazer and in about a week it's all out?
.Did you try putting in a can leak sealer. if it takes a week to loose it leak sealer should seal up the leak.

Bay City, MI

#118 Jul 7, 2013
compressor works, every line under the hood gets ICE cold yet all my vents blow is HOT air???? any ideas

United States

#119 Aug 8, 2013
I Have the heat problem i also have one with my fuel pump and now my car will go into reverse but notpve in reverse. It is ok in drive but my boyfriend
says something is wrong with the gear. Help!
1998blazerArizon a

Sierra Vista, AZ

#120 Aug 20, 2013
When im diving over 65 m/h my ac cuts out and it smells like maple syrup. why is it doing that?

Syracuse, IN

#122 Sep 29, 2013
98 blazer changed an now i have no heat or air no fan or anything when one push a/c button not even a light please help

United States

#123 Oct 28, 2013
I have a 98 blazer which blows ac, but no heat at all. What can I do to fix this problem???

United States

#124 Oct 28, 2013
the ac works. I changed the air filter, the thermostat, flushed it out, I'm lost and tired of freezing in nyc.(Please help me????)

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