Suburban heater

Asked by Oct 31, 2017 at 08:09 PM

Question type: Maintenance & Repair

My heater isn't get hot new heater core all knobs
are working correctly but even the heater core isn't
getting hot what could be the problem

1 Answer

37,895

If the heater core is not getting hot then coolant isn't reaching it. It may be a faulty heater control valve (a solenoid activated switch on the heater hose, see: http://www.autozone.com/cooling-heating-and-climate-control/heater-control-valve/chevrolet/suburban-1500), or it may be restricted coolant flow in the engine/radiator (caused by a weak water pump for instance). I would check the heater control valve first.

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