there's some info on the 2 types of factory installed heaters in
the accessories manual , but as they're optional accessories,there is no parts view of any of them anyplace, they come assembled!
if you have the deluxe heater, yes, you hafta take the case into 2 parts, the control [if original] is mounted on the core inlet - if you have the standard heater, there's no factory control in it - easiest to work on either if you take it right outta the truck cuz you can't really get at all the screws in place
Bill
