Guhindura ubushyuhe bwo guhumeka (Heater) nikintu gikoresha ubushyuhe bwa coolant kandi kigakoresha umuyaga kugirango ubijugunye mu kabari kugirango ushushe. Igikorwa nyamukuru cyimikorere yubushyuhe bwimodoka ni uguhindura umwuka mubushyuhe bwiza hamwe impemu. Mu gihe cy'itumba, itanga ubushyuhe imbere yimodoka kandi ikongera ubushyuhe bwibidukikije imbere yimodoka. Iyo ikirahuri cyimodoka gikonje cyangwa cyijimye, irashobora gutanga umwuka ushushe kuri defrost na defog.