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Discuss Strange fault with Drayton programmer in the Central Heating Systems area at ElectriciansForums.net

johntheo

DIY
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14
Welcome to ElectriciansForums.net - The American Electrical Advice Forum
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Have you checked the valve in the HW position or/and switched off the power to see if the valve then motors (spring return) to the HW position, it would seem that the valve is remaining in the CH position for whatever reason, what about cylinder stat?.
 
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johntheo

DIY
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OK, but when you say "hot water not heating" you should then be able to establish with a multimeter if incorrect signal is still going to the valve or if the boiler is not getting a signal to fire up or whatever. If just switching the power off-on without removing/replacing the programmer then that would indicate not a pin problem.
 

Attachments

  • Mid Position Valve.pdf
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  • Mid Position Valve Switches.gif
    Mid Position Valve Switches.gif
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  • Y plan mid position valve Operation.docx
    122 KB · Views: 3
  • Y Plan Wiring.gif
    Y Plan Wiring.gif
    19.8 KB · Views: 4

Britmanuk

DIY
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1
The only fix currently is when the unit is removed and replaced via the bracket.

If it continues to fail CH or HW and it changes from town to time, I'll gent a sparky in again, failing no problems with electrical, I will buy a new brand of timer.
 

johntheo

DIY
Reaction score
14
Maybe worth having a read.

 

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