Re: FW: [AmelYachtOwners] Onan Generator exhaust temperature switch -
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Eric and anyone interested:
First thanks Eric for the research and the offer to help others.
BUT, there are many different Onan models among all of the Amel owners. Onan models installed in Amels sometimes changed yearly and some models had different parts mid-year. Some Onan models have the Temperature switch part 309-0295-01 which is a Normally Closed Switch (NC). This is the one Eric has pictured. Other Onan models have part number 309-0295 which is a Normally Open Switch (NO). Which sensor you have depends on your Onan Model and Serial. Check the parts manual for your model to determine how to test this sensor. Or call your Cummins/Onan dealer with your model and serial number.
Also in an emergency after breaking a Normally Closed switch, you can run the generator by jumping the two wires together. Or if you have a Normally Open switch by disconnecting and isolating both wires. I DO NOT RECOMMEND THIS TO RUN YOUR ONAN WHEN IT IS OVERHEATING. But is the switch is broken and you monitor the temperature with a laser temp gun, it is OK to do this temporarily.
On Sun, Aug 15, 2021 at 2:41 PM eric freedman <kimberlite@...> wrote: