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did you check the heater core because my truck did that and that was what was wrong
You should check the thermostat and the fuse for the heater.
Is this a 2003 Pontiac Bonneville? I need this answered for this year and make.
Check the temperature control cable
Low coolant? Thermostat not closing completely allowing engine temperature to rise? Plugged heater core? Temperature blend door malfunction in the HVAC housing.
depends. is the fan blowing? if not could be switch. if so you may need to replace the heater core first thing is see if your coolent is low. if it is you will not get any heat
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
Check the temperature gauge. If it is running cold, replace the thermostat.
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
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