If you are saying the heater is blowing out cold air you need to change the heater core which is located inside the dash
Check antifreeze level, then thermostat next, heater core last
start by changing the thermostat
How to change a heater cord for a 93 chevolete caprice
93-0=93
i had this problem ( but i might not work for you here is what i found) you have to check the fluid levels in you rad when cooled down you might not have enough coolent.
how do you replace a heater core in a 91 Oldsmobile 98
Check out the Google Images and search for '93 Ford F150 heater hose'. you should find it there.
I have the same problem with my 93 Chevy suburban also, and I found that the rear has a separate heater core located behind the rear right wheel well. From what I understand you have to locate it, and test it, and then flush it if the hoses are clogged.
It is cheaper to replace the heater core than it is repair it
check the coolant level first, low coolant will cause no heat, always check all fuses just in case
Both of the heater hoses come from the firewall. One runs from the firewall to the water pump, this is the outlet hose. The other hose runs from the firewall to the top of the engine, this is the inlet hose.
The heater core is behind your dash inside of the ventilation ducts.