Top Answer
User Avatar
Wiki User
Answered 2015-07-15 20:49:05

Thermostat stuck open or heater core clogged.

I had a similar problem in feb.2005 with my 1998 S-10 Blazer and it was due to the Dex-cool had turned to sludge , and that caused lots of problems.

The first thing to do is after the engine is warmed up, feel the heater hoses going into the heater . if they are hot then the problem is in the heater, probably just adjustment or fuse. If they are just warm to cool then the answer is in the engine, probably needs a thermostat.

answer can also be the temperature control switch in dasboard of car

User Avatar

Your Answer

Still Have Questions?

Related Questions

How do you determine why a 1999 Chevy Blazer just blows out cold?

I have a 1999 blazer. The heater core clogs up about once a year from the Dexcool. Try having it (heater core) flushed and use Prestone (Extended life) instead of Texaco.

How do you replace a heater core in a 2001 Chevrolet Blazer?

how do i replace a heater core in a 2001 Chevrolet blazer

Replace heater core in 1997 Chevy blazer?

how to replace a heater core in a 1997 Chevy blazer

Why does your heater barely get hot in a 2001 Daewoo Nubira?

2000 Nubira, same problem, no water flow from block to heater, core not blocked, runs fine????????????

Your 2000 blazer started blowing out air that was not warm when the heater was on. It started working after about 15 minutes.?

I am having the same problem.. I have already had to replace the intake manifold gasket cause it was leaking, still no heat. We will be flushing out the heater core to see if that's the problem. I may have to replace the heater core, we will see.

How do you replace heater door control blazer?

The heater door control on a Blazer can be replaced by purchasing a new one. The heater vent will pop out with a little nudge from a flat tipped screw driver. Then insert the new heater vent door control.

Where is the heater core on a 1995 Chevrolet Blazer 4x4?

The heater core is inside the heater unit on the passenger side under the dashboard

Is there an electronic heater control valve on a 2002 Chevy Tracker?

when you put drive chevy blazer 2002 ls 4wd it turns off, what's the problem

How do you change the heater core on a 1999 Chevy Blazer?

You have to completely remove the dash to get access to the heater core.

Why does Heater blows cold air on 2001 blazer?

you must have low coolant or a bad heater core

Is there a reoccuring problem with the heater core in an 2000 s10 blazer?

Problem is that the heater core is the highest point in the cooling system. being a closed system any air that enters is trapped in the heater core. Result, no heat. Recommended repair is to back flush heater core, refill cooling system making sure all air is released from the heater core. Replacement of the radiator cap at the time of repair is recommended.

How do you solve a heater control panel problem on a 1994 GMC?

You would diagnose the situation to determine the source of the problem you're having. At that point you can decide what steps are needed to repair the problem.

Why does heater still not heat up on 2000 Chevy blazer after flushing and changing termasate?

Heater Airbound? Heater control cable not working? Heater core plugged?

How do you replace a heater core in a 1994 Chevy Blazer S10 with AC?

Drain the water from your 1994 Chevrolet Blazer cooling system. Remove the heater core water supply hoses. Remove the heater core retaining bolts. Reverse the process to install the new heater core.

How do you change a heater core on a 1999 Blazer?

You have to remove the entire dash board to gain access to the heater core.

Why is there antifreeze leaking on the inside of your passenger side of your 97 Chevy blazer?

the heater core, heater core hoses or heater control valve is leaking

1993 Chevy Dashlights out and heater blowing fuses?

checkALL of your fuses short could be a problem. i have a 95 blazer, bumps may of screwed up wiring like in mine

Where is the location of the heater motor in 1997 Chevy blazer?

Same as a 96 blazer go here.How_do_you_replace_the_blower_motor_on_a_1996_Chevy_blazer

Where to find a heater core gasket for a 1973 Cherokee K5 Blazer?

The heater core has no gasket. If it is leaking, it must be replaced.

1995 blazer will not start unless the heater is plugged in?

Are you in Alaska? What heater can you plug in that is not already connnected. A diesel preheater maybe.

Why the heater blow cold air on 96 blazer?

the heater core was stopped up just flushed it out ok now

What are signs that there is a problem with a hot water heater?

There are signs that there is a problem with a hot water heater. When you cannot get your water to heat. It could be signs that the pipes leading to the heater are leaking. It could be a problem with the thermostat in the heater.

Why would a 2001 Chevy Blazer heater only blow cold air?

Low coolant in the system. Defective heater control valve. Clogged heater core.

Blazer ac is blowing out hot air?

It may have a bad heater core.

Still have questions?

Trending Questions
What are fat burning foods? Asked By Wiki User
What is half of 16? Asked By Wiki User
Do potatoes have genders? Asked By Wiki User
Unanswered Questions