BAXI 105e combi - hot water/heating problem

Jennywrens · 18 Sep 2007

Anyone know what to check?

When the boiler is in just pre-heat water mode, the water heats up, but the pump keeps spinning once the water has been used.

Also, the main worry is that when we switch over to to water and heating, the heating does not switch on - we tested the timer by setting it to come on - the timer activated, but did not send the message to the heating to switch on.

We have replaced the pump - the old pump was not the problem by the looks of it.

HELPPPP!!!!

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GeckoGas-com · 18 Sep 2007

Unfortunately your description is not really suitable for diagnosis.

Have you got hot water all the time?

When you switch on the heating (With the taps closed) does the boiler do anything?

gas4you · 18 Sep 2007

Baxpoti is the man you want for this. I believe the pcb can be troublesome with these. He will point you right though.

Jennywrens · 18 Sep 2007

GeckoGas-com said:
Unfortunately your description is not really suitable for diagnosis.

Have you got hot water all the time? YES, WHEN THE WATER MODE ON

When you switch on the heating (With the taps closed) does the boiler do anything?

- NO - NORMALLY WE WOULD EXPECT 'CLICKING' SOUND WHEN IT SWITCHES TO HEATING. IT DOES NOTHING BUT JUST RUN.

Jennywrens · 18 Sep 2007

gas4you said:
Baxpoti is the man you want for this. I believe the pcb can be troublesome with these. He will point you right though.

OK, THANKS VERY MUCH - HE DID REPLY TO MY PREVIOUS ONE BUT WE DIDN'T UNDERSTAND - PERHAPS I OUGHT TO FIND THAT REPLY AND ASK

THANKS ANYWAY

baxpoti · 18 Sep 2007

WHAT LIGHT ARE DISPLAYED?

Oh, and turn off caps lock

Vic Spanner · 18 Sep 2007

Is your hot water neon always on.

Agile · 18 Sep 2007

If its staying in DHW preheat and NEVER changing to CH then the motor actuator might have failed ( or its control circuit on the PCB or the sensor is not correct! ).

Tony

baxpoti · 24 Sep 2007

The answers to the questions above may give us more of an idea as to the root of the problem.

Jennywrens · 24 Sep 2007

GeckoGas-com said:
Unfortunately your description is not really suitable for diagnosis.

Have you got hot water all the time? (re-replying) - yes

When you switch on the heating (With the taps closed) does the boiler do anything?

- the CH light will only come on if the boiler is cold, and the taps have not been opened. If we switched from water only which had heated up, to CH mode, the CH does not come on

Jennywrens · 24 Sep 2007

poxi said:
Is your hot water neon always on.

I am sure it only lights when we turn the water pre-heat knob round

Jennywrens · 24 Sep 2007

Agile said:
If its staying in DHW preheat and NEVER changing to CH then the motor actuator might have failed ( or its control circuit on the PCB or the sensor is not correct! ).

Tony

yes, this seems to be the case - it NEVER changes back to CH once hot water has been used

diynot

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BAXI 105e combi - hot water/heating problem

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