Haier HVW18 - Always at the Lowest Temperature Level; The Unit Stopped - no Function

D. Always at the lowest temperature level, and it can not be adjusted by the rotary switch
Analysis
The rotary switch is failure, total current pass through the switch.
Dis-connect the rotary switch from the main circuit. To ensure the switch is down, test it with a
electronic multi-meter.
Remedy
Change a new rotary switch.
E. The unit stopped – no function
The total unit is stop even when it is plugged-in
a. Power input connection
Check if the plug is well fitted into the mains socket. If no, fit it well and re-test the unit. If
yes, check if the power input cable is well connected to the PSU input terminal. If yes,
check all the wire connection.
b. All wire connection
Check if all wire connection is connect well. If yes, check the PSU.
c. Thermistor (NTC)
If the thermistor is down, the power of the total unit will hold.
Analysis
Check if the thermistor is normal by measuring the resistance between both terminals of
the thermistor. For the measuring position, please refer to the diagram in below.
When “open-circuit” is measured, the thermistor is down. Must be replaced (For the
position of the thermistor, please refer to the diagram in below).
NTC terminals NTC Position