Thermann Aestiva 3 Sensor Solar Controller (includes free thermal heat paste) related-senztek-1-2-solar-hot-water-sensor-controller-pump-station this 2-3 model is often

this 2-3 model is often the safest replacement option

Senztek controllers automatically manage water circulation between your roof collectors and tank

Tank sensors are generally only rated to 90 degrees

it may be easier to replace all the Heavenly Solar components with a complete pump station

5M tank sensors (FRP6)

Thermann Aestiva 3 Sensor Solar Controller (includes free thermal heat paste) related-senztek-1-2-solar-hot-water-sensor-controller-pump-station this 2-3 model is oftenThermann Aestiva 3 Sensor Controller (includes free thermal heat paste) Solar Hot Water Parts includes heat transfer paste and joiners with this controller. Controller includes: 1 x 20 roof sensor 2 x tank sensor Thermal heat paste included for roof sensor installation Overview Designed in Australia for Australian conditions. Comes with most features and end user adjustability. All connections are plug and play. Features Fully digital LCD display