Honda Accord



January, 21, 2007 AT 8:20 PM

I have a 1994 Honda Accord, 4 cylinder 2.2 VTi. With the hot/cold control turned fully off (most cold) position, I still get some warm air flow. In hot weather, with the a/c on it is just enough to overcome the warm air and turn it cool. Can you advise what the problem might be please?


2 Answers


Bruce Hunt

January, 22, 2007 AT 1:31 PM

There is a plenum on the vehicle and the door is not closing all the way to shut off the heat. If there is not a plenum, it is the vacuum, motor or cable that is no fully closing the heater valve.



January, 22, 2007 AT 5:21 PM

Bruce is generically correct however.

If you want to enjoy a comfortable and cool ride during summer then switch off the heater. On the other hand, heating system in the vehicle keep you warm during winters. In order to attain proper functioning of heater control, you must know the procedure of its maintenance. Although, it sounds simple, yet you must examine it closely.

Coolant plays is the key component of both the cooling system and heating system of vehicle. If engine gets over heated then engine parts will be damaged. Circulation of coolant through engine passageways cools down the engine. Later, it passes to the heater core.

Flow of hot engine coolant through heater core is controlled by a device known as heater control valve. In order to regulate the flow, it is positioned in one of the heater hoses. Thus, it helps in controlling the heater output.

The lever of heater control is connected with cable that runs up to the control valve. This control valve is placed at the top of heater box. When the lever moves, cable will also move. This leads to the opening of valve. During the closed position, the lever of heater control locks in a positive detent at the control, along with operating valve. You can also observe the working of heater control by closing off the heat. You will found a folded cable. Thus, water valve is unable to close completely.

You must clean the heater control periodically. This includes cleaning and greasing of control valve and lever of heater control. Such periodic cleaning will enhance the life and efficiency of heater control. If the heater control of vehicle is completely worn out then replace it immediately. Driving vehicle with a worn out heater control would be torturous. Moreover, it would also affect the performance and efficiency of vehicle. You must take adequate care and research while buying a new heater control.

God Luck and let me know Losone

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