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There is no heater matrix for the back air vents, only and evaporator for the A/C. My suburban always blowed cold until I added an extra rear heater matrix.
how to change heater core in 98 suburban
where is the heater control valve on a 1994 2500 suburban
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
The heater core on a 1985 Chevy Suburban is located under the dashboard on the passenger side of the vehicle. The glove compartment may have to be removed to access the heater core.
there are 3 main reasons that your a/c is blowing warm during a call for cooling they are 1.the electric resistance heater is on 2. the reversing valve is energized in a Heat Pump, or you are low on refrigerant
If your heater is a heat pump , then yes.
Low coolant and a clogged heater core are possibilities.
faulty control valve on heater or air in the lines
If you feel no air blowing at all (when you are not moving) then your fan is not blowing. If it is blowing air, and it is cold, when the heater is on, then most probably your heater core is leaking, or is clogged. These are easily replaceable and go bad all the time in older cars.
You may need to replace your Thermostat or your Heater Core.