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Rob
Rob, Home Appliance Technician
Category: Appliance
Satisfied Customers: 420
Experience:  20 yrs. experience with a major worldwide manufacturer.
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Our Bosch Greenstar Ri Boiler makes a grating sound which

Customer Question

Our Bosch Greenstar Ri Boiler makes a grating sound which lasts for about 10 seconds at random times day and night whether the boiler is on or off. Can you help?
Submitted: 5 months ago.
Category: Appliance
Expert:  Andrew Smith replied 5 months ago.

Do you have the hot water preheat activated?

Customer: replied 5 months ago.
What does that men?
Expert:  Andrew Smith replied 5 months ago.

Sorry the Ri is a heat only boiler.

It does have a frost protection setting if the house drops below 8 degrees?