Most helpful positive review
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Works Great - Location is Critical
on November 27, 2011
I have two Napoleon gas fireplaces in my home. The newer gas fireplace came with a thermoswitch to automatically turn on the blower when the fireplace gets hot. The older gas fireplace had a blower but it did not come with a thermoswitch. The automatic blower is a very handy feature. I wanted to upgrade my older gas fireplace to have this feature.
My local Napoleon dealer wanted $35 for a new thermoswitch. Amazon had a much better price. The only difficulty with the 19-SF2-115 switch is that it "turns on" at a lower temperature (110F) than the one supplied by Napoleon (120F).
I first tried installing this switch it to the side of the fireplace box (same location as my newer gas fireplace). The problem with this location, is that the sheet metal box stays warm at this location for a long time, even after the fireplace flame is turned off. I discovered that the blower would stay on for 3-4 hours after the flame turned off. This is probably why Napoleon uses a 120F switch instead of the 110F switch. By the way, the 120F thermoswitch switch takes a good 15 minutes to turn on.
By experimentation, I discovered that if I mounted the 110F thermoswitch on the sheet metal air deflector directly above the fireplace box (see attached photos), the blower starts approximately 2 minutes after the flame turns on and shuts off approimately 8 minutes after the flame turns off. It is the perfect location for this switch!
The switch is held in place by two magnets that I epoxied on to the sheet metal tabs on the switch (see attached photo). I wired the thermoswitch directly into the 110VAC blower circuit using a total of 8 feet of 250C high temperature wire (available on Amazon and the major auction site).
As a point of interest, I also have the gas valves on both gas fireplaces connected to a "millivolt" thermostat located on the other side of the room. The thermostat turns on and off the gas fireplace to maintain the temperature of the room. I set the thermostat in my basement to about 65F. It works very nicely to take the "chill" out of the basement.
Summary: The switch works well, but some experimentation with the location may be required.
Hope this review helps!