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I have a 2000 s 10 blazer heater doesnt work..but all fues are good and tried replacing swith in effect..but blower works just fine? Any ideas

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Does the engine reach normal operating temp? Are the heater hoses hot, engine at normal operating temp? If that checks out, my next thought is temp door or actuator under the dash.

Posted on Nov 20, 2014

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Sound like a heater core, the heater core would be under your dash..Another sign of the heater core being gone, is you would notice the floor board being wet..It is possible that maybe at some point the floor board was wet and you didn't know here it came from and didn't give it another thought..But if the blower works..I would bet heater core...Or it could be a thermostate..check the thermostate first it would be the easiest.. and the cheapest..

Posted on Nov 20, 2014


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Posted on Jan 02, 2017

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SOURCE: No heat in cab. Blower working fine.

Make sure that you have enough coolant in the system and that it is getting to the heater core. Also make sure that the blend door on the heater box under the dash is moving from cold to hot. Also make sure that the temperature knob on the console is actually turning to the hot side and not turning.

Posted on Oct 02, 2009

  • 261 Answers

SOURCE: Heater Fan/Blower does not work.

what you need is a blower motor resistot

Posted on Dec 04, 2008

  • 4669 Answers

SOURCE: heater system

If you smack the blower motor when it isn't working does it start?

Posted on Mar 11, 2009

  • 5 Answers

SOURCE: Blower for heater and ac not working. fuse and

The heat selector switch in the heater control knobs is the only electric style in the group. The rest are cable driven. It may need replacement.

Posted on Oct 21, 2009

  • 21 Answers

SOURCE: haeter blower not working blower

Does your truck have a cabin filter? Have you checked the cabin filter (under the dash on passenger side)?

Posted on Jan 03, 2011

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1 Answer

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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

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