How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Phil Your Own Question
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

Control board shows "Pro" not a conventional error code. I

Customer Question

Control board shows "Pro" not a conventional error code. I need the boiler operating to make hot water now. Do I need a technician to reset or can I do this myself following Part 12 Start-Up procedure in the Boiler Manual? I am accustomed to annual cleaning (de-liming) and periodic cleaning of the rectifier probe to clear faults.
Submitted: 1 year ago.
Category: HVAC
Expert:  Rick replied 1 year ago.

is this a Munchkin? What is the system pressure on the gauge?