Set Appliance State:
Set Multimeter to Resistance 
Isolate Mains Power to appliance as per TOPs P4
Ensure Appliance is switched OFF.
Note:
The facility to add a frost thermostat is only provided for on more recent appliances, (a 14 way terminal block will be in place of the existing 12 way version).
Note:
If no frost thermostat is fitted select the "Open circuit measured on both tests" option below.
Ensure Appliance is switched OFF.
Note:
The facility to add a frost thermostat is only provided for on more recent appliances, (a 14 way terminal block will be in place of the existing 12 way version).
Note:
If no frost thermostat is fitted select the "Open circuit measured on both tests" option below.
Measurement:
Test 1.Test for an open circuit across the frost thermostat connections 11 and 9.
Test 2.Repeat test across connections 11 and 14.
Note:
Ensure that frost thermostat is not below its switching temperature (frosty weather)!
Test 2.Repeat test across connections 11 and 14.
Note:
Ensure that frost thermostat is not below its switching temperature (frosty weather)!
