The heat source controlling circuit of the heating system includes at least an oscillating circuit, {TAIL ~ a transistor} and a diode for controlling the heating frequency of {HEAD ~ the heating mechanism} 
The heat source controlling circuit of the heating system includes at least an oscillating circuit , { TAIL ~ a transistor } and a diode for controlling the heating frequency of { HEAD ~ the heating mechanism }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD