98 Blazer no heat
#1
98 Blazer no heat
i have a 98 v-6 blazer. i have flushed out the heater coil and i have replaced the thermostat. i only seem to get warm air out of the vents when the engine is over 2500 rpm, otherwise it is just cold air. any ideas...?
#5
check your hoses going to the heater core...both should be roughly the same temp when at operating conditions...do you see coolant circulating while it running? Mine just blew cold air until I flushed the heater core directly with a garden hose...outlet to inlet first, then inlet thru outlet..rad cap, thermostat, and water pump are good areas to check as well...dex-cool has done nasty things to many vehicles from what i hear....
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