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Old 18 Jun 2011, 03:31 pm
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Default 2002 honda accord AC/Heat fan only comes on on full blast?

Our 2002 Honda Accords AC stoped working. When set to Auto nothing happens, on manual it does not blow unless it's turned up all the way, but even then it doesn't blow cold or hot air, just air...to me it seems like a sensor issur or switch problem...any suggestions?
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Old 18 Jun 2011, 03:46 pm
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The blower fan speed is one problem. Replacing the fan resistor would fix that so all speeds work.















You need a mechanic to diagnose the no cold and no hot problem because there are several things it could be.
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Old 18 Jun 2011, 04:01 pm
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Thebax20 you are correct but let me add one more thing...high resistance in the blower motor causes the resistor to go bad...replace the blower motor as well...good luck
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Old 18 Jun 2011, 04:16 pm
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At least we all agree the resistor pack is causing the fan problem. I also agree that bad fan bearings can cause the resistor pack to fail, but every failed resistor pack I have seen had an open thermal fuse, evidence of overheating of the pack. The pack is located in the ventilation duct so it will be cooled by the fan output. Anything that impedes air flow... bad fan, all vents being closed.... will open the thermal fuse. About one in three failures I have seen involved a bad fan.
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Old 18 Jun 2011, 04:31 pm
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By far, the most common cause would be a slow leak in the system, and Freon might have been lost, causing warm air to blow. There also can be lots of other possibilities.































Simply recharging an A/C system never fixes anything. An electrical problem may have occurred if there is a leak. The system has three major components and a few smaller ones. Most of the time, your problem lies in at least one of the three big ones: compressor, evaporator, and condenser. It also has a small metal can, containing desiccant, which should be changed whenever the system is opened.















The components are in different locations in the car, so there really is no such thing as replacing the whole air conditioner as many people think they have after a major repair.































accondenser.org
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