LG MV1825SW - Manual (Page 34)

7-23
PROBLEM - E:
Unit does not heat up even if display counts down when START key is touched for
HIGH
POWER
cooking.
Check: 1. PRIMARY AND SECONDARY INTERLOCK SWITCHES
2. THERMOSTAT
1 2
Runs
Contact
OK
Resistance
incorrect
Check the continuity of H.V.C. (see page 7-16)
Normal H.V.T.
Resistance
incorrect
Normal H.V.C.
Abnormal
Replace H.V.D.
Normal
Magnetron
Replace
Magnetron
Normal
Normal H.V.D.
Check the
continuity of H.V.D.
(see page 7-16)
Replace H.V.C.
Normal
resistance
Replace H.V.T.
Normal
resistance
NO
continuity
Replace
circuit board
Normal
circuit board
Poor contact
Replace
circuit board
Normal
circuit board
Contact OK
Normal contact
Correct seating
Check contact of
connector S1
Check the contact of
relay 2(see page 7-18) Measure resistance of H.V.Transformer (see page 7-15)
Runs Runs Runs Runs Runs Runs