LeftieBiker wrote: Nhinman wrote:
LeftieBiker wrote:I know the heat pump system also incorporates a resistance heater like the earlier Leaf. This "PTC" heater supplements the heat pump down to about +5F (doing most of the heating below about 23F) and then replaces it completely. That's why it is often called the "hybrid heating system."
Does the resistance heater use circulating fluid, or just air passing over a heating element??
It uses fluid.
I spent some time looking under the hood. I could not see any water lines running through the firewall. I was somewhat confused by 2 sets of lines running from the heat pump into the cabin. I looked at the service manual, and noticed that there are 2 heat pump coils in the cabin. The service manual shows a PTC heater in the cabin, but no water lines. I am guessing that the PTC heater is run off the higher voltage of the battery pack, but I am not sure. It also appears that it must be just air flowing over the heating elements. The service manual does show heat shields around the PTC heater. I will have to look for the high voltage connection. The service manual was not clear on this.