Toyota stands out for its great parts. But consumers need new heater control valve parts if these parts are worn or damaged. The removal process for the Toyota heater control valve parts is as follows. Drain the cooling system. Next, disconnect the heater hoses, then disconnect the connector (if applicable). Finally, remove the retaining hardware. Symptoms of a bad Toyota heater control valve include no heat coming out of the ports, coolant leaks, lower coolant levels, and engine overheating. We have nearly all types of auto parts in our online catalog to give you a better vehicle both inside and out. Whatever you need for the automobile and its upgrades, we will try our best to meet your demands.