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My gl1200A normally runs between 4-5 bars on the temp gauge, with the occasional move up to six bars when in long heavy traffic or when its really hot (in traffic).

The fan normally comes on and shuts off in the 5 bar range.

I noticed over the last few weeks that the bike would run more in the 4 bar range and less in the 5. Well it looks like my fan is coming on at 4 bars now and running almost continously when the bike is warmed up. When I shut it down, it does eventually cycle off...in the four bar range



I think I have a fan switch that is going, thats my best guess. My question, is the fan switch/thermostat the same unit or are they different. For a replacement, can I get one from Honda still? How much do I have take off to get to it?



Thanks,



Jeff
 

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I am not sure on 1200's but on 1500's the fan switch is located on the bottom of the left Radiator. It just screws in and has one wire conected to it. You of course have to drain the cooling system to replace it. I just replaced mine as my fans were not working. They are working now after the replacement of the switch.


Ride Safe!!
 

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Switch is about $50 so I suggest removing it and checking in hot oil with thermometer.
92 Geo Metro switch will fit but you have to install extra relay. I had to replace relay next year, so it is a good idea to use OEM Honda part if you don't mind waiting.
 

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It almost sounds like the radiator or thermostat is weak. My 1200 would run in the three to four bar range with the fan coming on in the four to five bar range. Is the radiator not disipating the heat properly or is the thermostat weak or bad. Tony:waving:
 

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Maybe I'm wrong, but I don't think the radiator or themostat isthe issue. The themostat has replaced with an OEM unit in May and the Radiator had the coolant changed and was clean as a whistle.



Like I said, I'm not seeing an increase in bars, if anything, I'm seeing a slight decrease and instead of the fan turning on/ off in the 5bar range, it turns on/off at 4 bars. To me its either the fan coming on at a lower temp due to a bad themo switch, or the temp gauge is reading low due to a bad sender. What makes me think it is the switch is that every once in a while I would shut off the bike using the kill switch on the handlebars and wait to see how long it takes for the fan to shut off. I know it takes longer now with the weather in the 60's (F) than in July when it was 85F.
 

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fix the 3 yellow wires under the left side battery cover and run ignition coils off of battery thru a 10A fuse switched thru a relay, should make bike run much cooler
 
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