No heat

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I have changed thermo twice, core, coolent twice, and coolant temp sensor. and I still have no heat, if I drive all day it will blow hot! but other wise its cold. Motor heats up nice and everything is hot coolant, tubes. any ideas?

chevysilverado124 in Green Bay WI

Jan 9, 2011

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RepairPal Certified shops can diagnose and repair your 1998 Chevrolet Blazer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

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No heat

What is your question?

chevysilverado124 in Green Bay WI

Jan 9, 2011

2 Replies

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tunnelramon Jan 9, 2011

maybe check your heater switch for a fault or check for an intake gasket leak. those engines are well known for it.

chevysilverado124on Jan 9, 2011

how will I know if its the gasket? I don't have water in the exhaust, nor excesive white smoke? is there a heater relay anywhere? and the switch I am taking is the dial in the truck from hot to cold? But if I drive it all day I can get heat, and if the truck temp goes above 210 I can get heat. Can it still be the switch?

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gmbutkuson Jun 8, 2012

It's probably your blend door actuator and the whole dash will need to come off even though it is not a hard repair and the part is available at the auto parts stores. I have a 98 S-10 Blazer and this was the problem with mine.

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Popular Answer

What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 1998 Chevrolet Blazer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.