Boiler controller stuck

Hi,
My heating controller - Honeywell 9400T - is locked up. It has been showing the same time for 24 hours, and no matter what I press or where the slider is, nothing changes it. Fortunately it's "on" so I can control the heating with the thermostat for now. Turning the power off to it doesn't reset the clock or anything else other than turning the heating off.
It won't go into installer mode either.
I guess I need to stop the power then remove the panel from the wall and drop the battery out?
Any tips for me?

thanks
«1

Comments

This discussion has been closed.
Meet your Ambassadors

🚀 Getting Started

Hi new member!

Our Getting Started Guide will help you get the most out of the Forum

Categories

  • All Categories
  • 350.3K Banking & Borrowing
  • 252.9K Reduce Debt & Boost Income
  • 453.2K Spending & Discounts
  • 243.3K Work, Benefits & Business
  • 597.9K Mortgages, Homes & Bills
  • 176.6K Life & Family
  • 256.4K Travel & Transport
  • 1.5M Hobbies & Leisure
  • 16.1K Discuss & Feedback
  • 37.6K Read-Only Boards

Is this how you want to be seen?

We see you are using a default avatar. It takes only a few seconds to pick a picture.