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INSTRUCTION REF: IN145
ISSUE No. 2
DATE 25.02.09
Page 8 of 13
www.parry.co.uk
Pilot Burner will not light or stay lit
Are the
thermocouple/interrupter
connections secure
Yes
No
Is there gas at the point
when holding control
knob in the pilot position
Tighten
connection
Yes
Very little
No
Check
overtemperature
stat for open
circuit
Check
supply
Check
supply
Check
thermocouple
voltage
(minimum 15mv)
Check pilot jet for
blockages and
clean where
necessary
If all of the above are OK
the control valve may be
faulty