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Take it to a mechanic and say "will you fix the heater core?"
The Heater Core will be located behind the dash. Hope that Helps.
I had this problem before on a ranger you have to pull the dash board out and it will be right there.
Before CHanging the Heater Core, have you tried flushing it? I have a 99' Jimmy and have to do this every year to get my heater to work.
Drain the water from your 1998 Chevy Astro cooling system. Remove the water supply hoses from the heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
take out the glove box
On a 1998 Ford Ranger : The evaporator core for the air conditioning system is inside the plastic case ( that also holds the heater core ) located behind and below the glove compartment in the dash on the passenger side
You will need to remove the water supply hoses from your 1998 Oldsmobile Intrigue heater core. Remove the heater core retaining bolts. Reverse the process to install your new heater core.
How do you replace a heater core in a 1998 Ford Expedition?"
How do you replace a heater core in a 1998 ford expedition?"
You don't From, Gabe Higbee
Actually , the heater core doesn't have a drain