4.14. Surface Type NTC
Subject
Description
Function of Part
It ensures that the device works in accordance with its function,
by measuring the central heating supply and return water
temperatures.
Impact in Case of Malfunction
It causes the central heating not to work properly, not to heat up or
to overheat more than the set temperature.
Main Associated Error Codes
F33, F35, E80
Diagnostics and Test Method
The part may be tested by measuring the resistance between the
NTC terminals.
Maintenance Requirement
There is no special maintenance requirement.
Test definition
Test Method
NTC Resistance Measurement
NTC electrical connections are disconnected and removed. The
resistance between the terminals is measured and it is checked
whether it provides the appropriate resistance value suitable
ambient temperature according to the table. If the resistance
value does not comply with the table, the part is replaced.
Ambient temperature (°C)
Resistance between NTC terminals (k
)
0-5
27.3-22.1
6-10
21.2-18
11-15
17.3 - 14.7
16-20
14.1-12.1
21-25
11.6-10
26-30
9.63 - 8.3
31-35
8 - 6.95
36-40
6.7 - 5.8
45
