Question about 1998 Chevrolet Blazer

1 Answer

No heat after replacing battery

I recently replaced the battery in my 1998 Blazer and the next day, I don't have any heat. I was told to remove the RDO fuse and put back in..I did that. Hot air blowed out for a few seconds, but then went cold again. What do I need to reset?

Posted by on

  • yadayada
    yadayada May 11, 2010

    You really need a factory service manual for this one, we have no resources here for this kind of issue, try a web search or a pay site.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Expert
  • 55 Answers

Replacing the battery has no effect on the heating system. Do U have a temp gauge to know if the engine is getting up to temp? and then the heater should put out heat. If it doesn't then U should look at replacing the thermostat

Posted on Dec 15, 2008

  • mechelle207 Jan 29, 2011

    It's the blend door actuator. It's inside th glove box and should be a fairly easy fix or so I've been told.
    Here is some more info on it.
    I'm having the same issue and am looking for a resolve and this is the closest I have come. GL



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Battery lite comes on sometimes. replaced battery for 2x this year and had altinator checked on and off vehicle. it tested bad on and good 5x off (at 2 separate locations). told mechanic to check line...

you have a pcm controlled voltage regulator... in other your voltage regulator is built into the pcm... you can either replace the pcm or have the voltage regulator reinstalled on the alternator... the latter is cheaper most of the time... its not as simple as unbolting it from the pcm and its not something a home user can try to do... better to take it to the professionals for this. try a good alternator and starter rebuilder in your area... then and only then can you start testing to see why the battery light comes on whenever

Dec 28, 2013 | 1998 Plymouth Voyager

1 Answer

Battery losing charge...E430

its possible that the coils of the anternator are worn out.
then the batterie dont charge.take voltmeter and see if the engine,
is running ,if you read some 14.50 volts on the batterie is good.
if you read 12 or 13 volts is bad the anternator

Apr 22, 2013 | Cars & Trucks

1 Answer

How do you change a thermostat in 1998 blazer

The thermostat is under the fitting with the upper radiator hose on. Remove the 2 bolts replace the thermostat, add coolant. Allow the engine to heat up with the radiator cap installed on the lock position not fully tightened. The air in the system will purge out into the reservoir. Fill the reservoir to the hot line when fully heated and no air is coming out anymore.

Dec 06, 2009 | 1998 Chevrolet Blazer

1 Answer

99 chevy blazer some dummy lites and other stuff went out

if you had your dash removed and then replaced it could be that the wires and plugs are mixed up

Mar 12, 2009 | 1999 Chevrolet Blazer

2 Answers

Loss in fuel pressure

Need a new battery first, or charge the battery...if the battery is over 3 years old, I would just replace it, also may need a higher output alternator with more amps, to run the electronic fuel injection, fuel pump, and ignition etc...

Feb 26, 2009 | 1998 Chevrolet Blazer

1 Answer

Climate Control Module Reset

the problem is the blend door actuator. Its is located behind hte glove box. (as far up and to the left as you get get with your hand). The gear inside the motor will crack if it is overdriven. As far as the re calibration, pull the rdo fuse(s). wait about 30 sec. replace fuse(s) turn car to run wait for 40 sec or so. you should be able to get a flashlight and watch the motor turn back and forth. turn key off. you should have heat. if not, pull the motor out. very easy just two screws. open the motor can check large gear for cracks

Dec 02, 2008 | 1998 Chevrolet Blazer

1 Answer

Windshield replacement

Are you trying to remove your windshield? or replace it yourself? I would not recomend trying this at home. Due to the way cars are these days with airbags, and etc... It is just not safe..


Sep 02, 2008 | 1998 GMC Blazer

2 Answers

Problem with engine

did you have the head gasket replaced or the intake gasket replaced. it's important that i know exactly what they did to your engine. i will be able to pin point the exact problem

Aug 31, 2008 | 1998 Chevrolet Blazer

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

298 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides