Worcester CDi Combi N.G Service Booklet page 57

Set room temperature not reached (DT10/DT20)
Check
5. Air in the heating system.
Set room temperature exceeded by large amount
Check
1. Do radiators get too hot?
2. Bad choice of location for program-
mer, e.g. outside wall, near window,
in draught, etc.
3.
Excessive fluctuations in room temperature
Check
1. Poor choice of location for roomstat
e.g. outside wall, near window, in
draught, on hollow wall, etc.
8 716 115 748 (2009/09)
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
B Switch OFF the appliance.
B Check appliance and system for water leaks and
repair as necessary.
B Top up system.
B Switch ON the appliance.
B Select in the first service level the service function
2.C (Air purge mode).
B Select the value 1 and store.
B Exit the service function.
B The appliance vents itself for 8 minutes.
B Vent radiators manually.
Action
yes: B Decrease setting of "Heating" control.
go to 2
no: go to 2
yes: B Select better installation location.
or
B Fit external room thermostat.
go to 3
no: go to 3
B Turn down thermostatic valve(s).
Action
B Select better installation location.
RECTIFYING FAULTS
57