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The LED power light on all Xtreme Heaters indicate that your heater is powered up and ready for use.
Additional Testing
If you would like to test your heater further by simulating freezing conditions, this can be accomplished using refrigerant spray commonly found in electronics supply stores and also available from the Xtreme website.

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To simulate freezing conditions, spray the test port labeled on your heater where the thermostat control is located. By spraying this test port for 3 to 4 seconds, you can simulate the low temperature condition that will turn the heater on. The fan should start instantly and heat can typically be felt within a few seconds. |
It is a good idea to test your heater periodically and at the start of each cold season to ensure operation. If you try to put the heater in the freezer or other cold environments to test, it may take up to an hour for the metal to cool enough to trip the thermostat.
Note: It is a good idea to test your heater after the boat has been serviced by a third party.
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