Heater

[belsie]

Help it's cold in Florida!! Just tried the heat and blowing cold air? All seems to be working otherwise, flaps, dash to floor to defrost seems to work fine just no warm air.
Bad control valve under hood? If so any tests to confirm i.e. bypass it or??
Thanks for any help.....................

 

[HighMileage]

It might just be stuck. With the engine hot,feel before and after the valve with your fingers. Big temp difference means it's shut. If so,try moving it with your fingers. Make sure there's vacuum to it.

 

[wiseman]

Check to make sure that both of your lines going to your heater core are hot, if not then you may a clogged heater core

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