| If your fans are not going on when they should here is the culprit... Most outdoor wood boilers have these on their units, it protects the units from boiling over.SPST Fan Limit Control Thermostat Snap Disc Auto Reset, Opens 190 Technical Specs
 
 Item Snap Disc Control
 Type Limit, Automatic Reset
 Switch Action Open on Rise
 Switch Type SPST
 Temp. Range (F) 150 to 190
 Height (In.) 1
 Width (In.) 2-3/4
 Depth (In.) 1-1/2
 Circuit #1 Switch Closes @ (F) 150
 
 Circuit #1 Switch Opens @ (F) 190
 Differential 40
 Inductive Amps @ 120V 10
 Inductive Amps @ 240V 5
 Pilot Duty Contacts (VA) 125
 Resistive Amps @ 120V 25
 Resistive Rating 240V 25
 Resistive Amps @ 277V 21.6
 Voltage Range 120 to 277
 
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