Ka whakarerekē aunoa te thermostat i te nui o te wai e tomo ana ki te radiator kia rite ki te pāmahana o te wai whakamatao, ā, ka whakarerekē i te awhe tohanga o te wai hei whakarerekē i te kaha whakamarara wera o te pūnaha whakamatao, kia tika ai te mahi a te mīhini. Me pupuri te thermostat i roto i te āhua hangarau pai, ki te kore ka pā kino ki te mahi noa o te mīhini. Ki te whakatuwherahia te takirere matua o te thermostat i te wā roa rawa, ka wera rawa te mīhini; ki te whakatuwherahia te takirere matua i te wā wawe rawa, ka roa te wā whakamahana o te mīhini, ā, ka iti rawa te pāmahana o te mīhini.
I te katoa, ko te mahi a te thermostat he pupuri i te mīhini kia kaua e tino makariri. Hei tauira, i muri i te mahi tika o te mīhini, tera pea ka tino makariri te mīhini i te tere hotoke me te kore he thermostat. I tēnei wā, me whakamutu te mīhini i te rere o te wai mō te wā poto kia kore ai e tino iti te pāmahana o te mīhini.
