2005 Suburban Heater blows cold for 15-20 mins before heat arrives. Ideas???

Asked by masssuburban Oct 26, 2012 at 05:38 PM about the 2005 Chevrolet Suburban 1500 LT RWD

Question type: Maintenance & Repair

Dual manual climate controls and rear manual controls.  Haven't needed heat until recently.  Turn truck on to warm, even drive for 5-10 mins and heater blows cold.  Then decides to blow hot after 15-20 mins (roughly).  What can I troubleshoot?

1 Answer
385

Darryl answered 11 years ago

Check your coolant level. What does your water temp gauge read? If your engine has not warmed up you wont get heat. Since the heat comes from your warm coolant if your coolant level is low it will take longer for your heat to work.

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