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Plumberpro, Mechanical Engineer
Category: HVAC
Satisfied Customers: 634
Experience:  Over 20 years experience in plumbing heating and gas
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I have a five year-old Keston Gas Condensing Boiler, Model

Customer Question

I have a five year-old Keston Gas Condensing Boiler, Model Keston C40P. I have now replaced the Control Box Kit twice because of regular cut-outs. Afetr the last replacement- about a week ago- it worked perfectly for about a week and has now cut out again.
The indicator shows: 0 1.2, there is no heat generated but the fan continues at full speed.
Any ideas for cause or remedy?
J D-N.
Submitted: 2 years ago.
Category: HVAC
Expert:  Plumberpro replied 2 years ago.
Hi ,have you changed the flame recognition probe?