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Reset service timer on honeywell ST6100s

The service interval has come on our boiler. I need to reset the service timer to get hot water.on a honeywell ST6100s

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6ya6ya
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Posted on Jan 02, 2017

  • 148 Answers

SOURCE: Honeywell ST6400C - hot water not working

some digital thermostats do no not work with zone valves is this a new thermostat that you had installed

Posted on May 10, 2009

billyvangogh
  • 108 Answers

SOURCE: need to wire a honeywell RTH7400D thermostat to 3 wire hot water

Just mark the old wires on the old thermnostat...R , W etc...and put them on the same terminals on the new 1.....also there should be some adjustment ire : switch on the back or under the cover to adjust for Hot water heating or electric heat...either is the setting you should have it on....also you shouldn't setback the thermostat at night or when away very much....2 degrees is fine , as the boiler will run along time to raise the temperature in the morning and may not get there by the set time

Posted on Oct 26, 2009

  • 36 Answers

SOURCE: boiler is a baxi control for heating is honeywell.

this will be your diaphram inside your divertor valve.
the one that looks like a spaceship.
it will e split.

Posted on Jan 31, 2010

  • 2458 Answers

SOURCE: Honeywell ST6400C programmer

Hi yes sound like it not working on hot water only it would check ou the wiring on this side

Posted on Feb 18, 2010

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I have a honeywell st6100s, i have just had it serviced, but it still flashes up service due and reads off and the timer can not be set


Normal 0 This unit can be reset, just a little complicated thats all.
Firstly, move slider to 'set program'. Then, on the left of the unit are two buttons, 'override' & 'extra hour'. Press and hold both together 'till 'inst' shows on the panel ( about 5 seconds ).
Then ( lots of fingers required! ) press and hold the two buttons mentioned above, along with '-' '+' & 'next on/off ( total of five buttons! ) until the user menu flashes up.
Now scroll to AL, which is probably showing a value of '1', this wants to be changed to '0' to turn off the 'service due' warning. To save this value, press and hold the first two buttons once more and then simply move slider back to 'run program'.
Job Done!!!
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