9
• The heater fails to start/ignite
• Defective transformer or electronic
control unit
• Faulty air switches
• Check the air switch, filter & tube,
replace if defective
• Call Tech Service
• Control board or overheat limit
needs reset
• Push button to reset (see below)
(Confirm “H” Mode)
• Call Tech Service
• Confirm correct supply & manifold
gas pressure
• Make sure the warm air can exit freely
• Call Tech Service
• Faulty operation of room thermostat
Connect thermostat (optional) or blind plug to
thermostat receptacle. Unit will not run without
one of these items plugged into receptacle.
Содержание DG250
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