Thermostats - Over heat Cut Out
Over heat cut out thermostat (Set @ approx. 90 – 98 degrees C)
Reasons to activate an over heat cut out thermostat
Scale / magnetite deposits causing excessive heat build up
Loss of system water
Loss in manufacturers calibration
Faulty p...
Thermostats - Liquid Expansion
Thermostats - liquid expansion / Vapour Pressure Type
Liquid expansion / vapour pressure
Reasons to affect a liquid / vapour expansion type thermostat:
Contact points worn out, burnt out or pitted
Loss in manufacturers calibration
Phial...
Boiler Fault Finding – Thermostats – See also:
- Cylinder Thermostats
- Room Thermostats
- Thermostats Overheat Cut out
- Thermostats Liquid Expansion
- Electrical Safety Checks – Resistance to Earth
- Top Tips for the Heating Engineer