I have a 93 Toyota Pickup that is blowing very little heat. I replaced the thermostat, but the best I can get is a warm spring breeze. I've checked to make sure there is no clog in the heater core (Water runs clean both directions). Temperature gauge shows engine temp at healthy level.
Could this be anything other than a bad heater core?
I have not replaced a heater core before. If it is the heater core, how difficult will it be?
If I decide to take it into a shop, what would be a fair price for them to replace it? A/C unit has been removed, so they don't need to unhook and recharge it.