Ariston Bulb Thermostat 70 Degree 60001791

The Ariston 60001791 is a bulb thermostat rated at 70 degrees, used to sense and control water temperature inside the appliance. It is a capillary-style thermostat with a sensing bulb that sits in contact with the stored water, switching the heat source as the set point is reached. It is listed by Ariston for use across the Aquabravo ITD range of unvented hot water cylinders.

• Domestic hot water runs hotter or cooler than the set point on the cylinder control
• Water temperature fluctuates between draws rather than holding steady
• The cylinder fails to reach temperature and the heat source cycles on and off without heating the store
• The thermostat bulb or capillary is damaged, kinked or corroded
• Overheat or lockout faults traced back to a thermostat that no longer opens or closes correctly

• Confirm the appliance model and serial number against the compatibility list, as the same cylinder family uses different thermostat ratings
• Check the existing thermostat rating and capillary length match the 70 degree unit before fitting
• Inspect the thermostat pocket and any sealing washer or gasket at the same time, as these are often disturbed during replacement
• Isolate the electrical supply and drain or depressurise the cylinder as required before removing the old thermostat