I got a bunch of old heaters when I got my 51 3100.
Can anyone tell me what heater I have installed? I'm assuming it's a recirculating heater? The blower has a switch under the dash and there is knob on the heater to direct flow. I also have a valve on the side of my thermostat. Is that to let coolant into the heater core?
What are the two other heaters I have? I think one is the fresh air heater, but not sure about the other fan?
If look at the assembly manual, there are a bunch of holes on the firewall for "Heater LD". Is that the fresh air heater? I'm going to use a bunch of stainless bolts and fender washers to seal them up, but what do people do about the big oval in the firewall? My floor is rust free, I'd like to keep it that way...
