The first thing i would check is if both heater hoses going to the heater core are getting really hot when the engine is fully warmed up.

Answered by saturntech9 (expert)
23,193 answers provided

Sorry where's the heater core and heater hose located

Response from Randy77
1 question asked

Base of the windshield follow that down towards the middle you will find two hoses going to the heater core.

Answered by saturntech9 (expert)
23,193 answers provided

If they are cold and not hot what then

Response from Randy77
1 question asked

If cold there is no circulation, either a faulty heater tap or a blocked heater core.

Answered by mhpautos (expert)
26,915 answers provided

If one is hot blocked restricted heater core if both is hot blend door issue or blend door control issue.

Answered by saturntech9 (expert)
23,193 answers provided