BAXI Combi 133 HE Plus timer issue

[johnnyduk]

Nev

When you say 'My boiler works perfectly other than pressing winter button starts heating and will not shut off till re-pressed. '

Does the internal CH stat turn the heating off and on?

Just checking, mine does

JD

 

[johnnyduk]

Hi Nev

I do have a voltage at the orange wire, however I don't have a voltage at point F on page 57 of the manual, that indicates a Link wire fault from prog 2 to r/s 1, these wire's go back into the mains cutoff switch on the wall, so I am not sure what happens in this switch?

Regards

JD

Hi,

my boiler is doing the same as yours, i doubt it will be the diverter valve as it makes no difference if the electric control plug is connected to it.

I have had a chat with Baxi and ruled out frost protection as all the sensors are reading the correct resistance. They are telling me if there is no voltage (230 volt) at the orange wire ( at timer connector strip) then the problem is with the PCB.

My boiler works perfectly other than pressing winter button starts heating and will not shut off till re-pressed.

If I can't fix it I am probably going to find the wires at the winter switch and take them through the timer contacts - using as a switch - not switching 230 volt, just volt free switch.

Nev.

 

[johnnyduk]

Actually correct that, I do have a voltage there also, that point is a neutral point. So all voltages are correct, I still think its a pcb fault now

JD

 

[baxpoti]

What external controls do you have?

Intellistat by any chance?

 

[johnnyduk]

No, its a Honeywell CM37, and I can confirm this is working, because there is 240 volts at the orange wire mentioned earlier which comes from the timer when the timer is on

JD

 

[johnnyduk]

Did you find a way to do this Nev ?

JD

Hi,

my boiler is doing the same as yours, i doubt it will be the diverter valve as it makes no difference if the electric control plug is connected to it.

I have had a chat with Baxi and ruled out frost protection as all the sensors are reading the correct resistance. They are telling me if there is no voltage (230 volt) at the orange wire ( at timer connector strip) then the problem is with the PCB.

My boiler works perfectly other than pressing winter button starts heating and will not shut off till re-pressed.

If I can't fix it I am probably going to find the wires at the winter switch and take them through the timer contacts - using as a switch - not switching 230 volt, just volt free switch.

Nev.