Question about 1994 Chevrolet S-10 Blazer

1 Answer

I have a 92 blazer with an oversized radiator and the heater only blows cold air any suggestions

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 11 Answers

What size engine thats a 4.3 right? Did it come with DEXCOOL in the coolant system If so the heater cores probablly clogged. That stuff is horrible.. does the engine get to operating temperature?

Posted on Nov 03, 2010


1 Suggested Answer

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Heater blowing cold air replaced thermastat next day heater blowed hot then it started blowing cold again has a new radiator and the water is not low

Flush coolant system out first with prestone or peak coolant flush if problem still exist replace heater core.

Apr 05, 2011 | 2001 Chevrolet Blazer

1 Answer

My 98 blazer is over heating and the heater is blowing cold air.. I already changed the thermostat and added radiator fluid... What else could it be??

Symptons still sound like radiator is low. When engine is cold , take off radiator cap and and start vehicle. Let it idle until you can see that the water is circulating (once the engine thermostat opens up). Top it up until Rad is full and still circulating. Then check your heater . Put cap back on and hopefully your problems are solved. Also check under vehicle when it has idled for a while to make sure there are no leaks. Top your surge tank up to appropriate level. Good luck.

Nov 24, 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

Heater blows cold air

Check there is water in it first. A black cap on top of the radiator. If the level is ok then a wee red dipstick should float up.

Dec 12, 2009 | 1999 BMW 323 Series

1 Answer

No heat, blows cold air, flushed system, then a day later blew radiator, changed that still no heat... one mechanic said its the blender box? any suggestions will help...

I would check the heater tap in the heater hose, this may be blocking the flow. {causing excess pressure It could also be possible that the heater cable may have come off the back of the control or off the heater flap on the box. lastly, replace the $8 engine thermostat. You can also test it in a glass of boiling water and watch to see if it opens. Good luck.

Nov 19, 2009 | 1998 Chevrolet Blazer

1 Answer

Heat isnt working. it just blows out cold air.

change your heater core usually on pass side underdash.
have fun standing on your head to do it

Oct 30, 2009 | 1992 Honda Accord

1 Answer

2001 chevy blazer, heater blowing cold air

Pull the stereo back out . they have bumped the vacuum lines that connnect to the heater near the rear of the switch ..

Jan 25, 2009 | 1994 Chevrolet S-10 Blazer

Not finding what you are looking for?
1994 Chevrolet S-10 Blazer Logo

61 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

85161 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides