Heater core for Minis 1991-on. Plastic tank with 5/8" hose outlets on left hand side. While it may be possible to clean or repair the earlier, all-copper matrix heaters, these later units have an aluminum matrix with plastic tanks and must be replaced with new.
See JEP10008 for outlet repair kit specifically for this heater core.
3/16/2020 2:00:00 AM