Hi,
I have a problem with my Baxi 105e Combi in that the needle from the DHW pressure differential can get stuck in the DHW mode and eventually returns several hours later. Because of this the CH does not come on until the needle retracts.
I often take the microswitch housing off and push the needle in manually. The boiler behaves fine for a while, but if the hot water tap is on for a while, say for bath or shower, then the needle again gets stuck.
Could this be a problem with debris in the venturi pipes that come from the diaphragm housing? I've tried dissembling , checking diaphragm and lubricating (WD40 is this suitable?) but no result.
CH is fine otherwise.
Can anyone suggest any possible causes?
Cheers.
I have a problem with my Baxi 105e Combi in that the needle from the DHW pressure differential can get stuck in the DHW mode and eventually returns several hours later. Because of this the CH does not come on until the needle retracts.
I often take the microswitch housing off and push the needle in manually. The boiler behaves fine for a while, but if the hot water tap is on for a while, say for bath or shower, then the needle again gets stuck.
Could this be a problem with debris in the venturi pipes that come from the diaphragm housing? I've tried dissembling , checking diaphragm and lubricating (WD40 is this suitable?) but no result.
CH is fine otherwise.
Can anyone suggest any possible causes?
Cheers.