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Ask the Mechanic
Wed May 1, 2013 11:40 AM CDT

Q: My question is about starting my 7200 John Deere tractor in cold weather. The tractor has an auxiliary heater that plugs into a 110 outlet. It has a ground fault interrupter with a test button. My manual says to test before each use, but it doesn’t tell me how to test it. What should happen when I push the test button, and when do I use the reset button?

A: The block heater on your 7200 should begin to make the engine block feel “warm” in about 30 minutes. Also, if you have hearing ...

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