Viessmann Vitodens 050-W Installation And Service Instructions Manual page 46

Troubleshooting
Repairs
(cont.)
Checking the temperature limiter
46
Check the temperature limiter if the
burner control unit cannot be reset after
a fault shutdown, although the boiler
water temperature is below approx.
A
95 °C.
1. Pull the leads from temperature lim-
iter A.
2. Check the continuity of the tempera-
ture limiter with a multimeter.
3. Remove the faulty temperature lim-
iter.
4. Install a new temperature limiter.
5. Reset by pressing "Reset" on the
control unit to (see page 42).