Technician A says that one heater hose should be hot and the other hose cool if the heater is functioning okay. Technician B says that both hoses should be hot to the touch. Which technician is correct?A) Technician A onlyB) Technician B onlyC) Both techniciansD) Neither technician

The correct answer to the question is

B) Technician B only

Explanation:

A heater hose is a relatively inexpensive rubber hose used to transmit engine coolant though the engine to the radiator that supplies the heat required in the cabin. They normally extend from the engine to the dash board.

The heater hoses should be hot. If the hoses are cold, it is an indication of a blocked flow from either the heater control valves is blocked   or the radiator becoming clocked with debris.