Its on the front of the diverter valve assembly. The microswitch has two wires into it. Microswitch is held on by clip. Pin should pop out when hot tap turns on. probably not this but best to check basics first. Have you checked the motorised valve is ok on top of diverter valve?
Hot Water Not Getting Hot baxi 105e.. The Return!!
- Thread starter neilyp
- Start date
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Ok i have checked the diaphram and it has no splits at all but the there is some scale on it. I have checked it working and it does push out the little pin to press the micro switch.
What i have noticed now is that if i turn the central heating up full the flow pipe inside the case gets nice and hot, however once the HW tap is on the flow pipe suddenly cools down to a mild warm temp.
(a bit like its suddenly being cooled)
Im going to take the diverter out and have a good look but in the mean time if this throws more light on the problem then please tell....
Cheers
What i have noticed now is that if i turn the central heating up full the flow pipe inside the case gets nice and hot, however once the HW tap is on the flow pipe suddenly cools down to a mild warm temp.
(a bit like its suddenly being cooled)
Im going to take the diverter out and have a good look but in the mean time if this throws more light on the problem then please tell....
Cheers
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Please explain more about the DHW thermistor? Im not familiar with this?
What does it do and how would this effect the water temp?
Cheers
What does it do and how would this effect the water temp?
Cheers
and i continue.... I have changed the wet thermistor / temp sensor on the DHW. Sadly its made no difference....
arghh... all can think of is the divertor.. and i have checked the diaphragm which appears fine...
Does anyone know exactly whats inside this type of divertor? Is it the same as the normal type? Just a hard rubber ball on a stem?
I just need to be as certain as possible before i fork out the cash for a new one.
Cheers
arghh... all can think of is the divertor.. and i have checked the diaphragm which appears fine...
Does anyone know exactly whats inside this type of divertor? Is it the same as the normal type? Just a hard rubber ball on a stem?
I just need to be as certain as possible before i fork out the cash for a new one.
Cheers
Because this is not an urgent fix and I think there's something very obvious being missed here....
I suggest, you have a look at taking out a boiler breakdown policy with someone like domestic and general.
Downside being you may have to wait 28 days before claiming. The cost is likely to be around the price of a diverter, which I don't reckon you need!
I suggest, you have a look at taking out a boiler breakdown policy with someone like domestic and general.
Downside being you may have to wait 28 days before claiming. The cost is likely to be around the price of a diverter, which I don't reckon you need!
Apart from some Vaillants, I cannot think of any other boilers which use a hard rubber ball in their diverter.
Which other ones were you putting into your "normal" category?
When the DHW is not being heated properly is the burner staying on and heating up the rads ???
Tony
Which other ones were you putting into your "normal" category?
When the DHW is not being heated properly is the burner staying on and heating up the rads ???
Tony
I to have the exact same problem, i changed the divertor valve complete which made no differance at all.
Changed both thermistor and plate heat ex also no differance.
So i will look forward to the solution being posted on here.
Changed both thermistor and plate heat ex also no differance.
So i will look forward to the solution being posted on here.
Right folk,
I have been in touch with Baxi regarding this issue and heres whats been said,
Main issue is where is the heat going? If its not going down the flow then it must be going somewhere or the boiler would cut out in minutes!
I have checked the pressure to the gas valve which is actually 30mb!
The burner pressure is not givin a big reading approx 1mb although im not sure if this boiler has a zero govner, (i think not)
Baxi advised me to check the reading across the "modureg" which should be min 1vDC / max 9vDC.
Mine is read fine on CH side though a tadge over 9v (10)
On DHW side its staying on 10vDC and not modulating up and down! However this still doesnt make sense as this would suggest the water being too hot and not turning down.
Baxi said if these figures were not right then it would be the pcb however i would expect them to be lower rather than higher for the water to be cold.
(Also the burner is quite high which also makes no sense)
Any Baxi engineers out there can you tell me if any of this makes sense.
I have been in touch with Baxi regarding this issue and heres whats been said,
Main issue is where is the heat going? If its not going down the flow then it must be going somewhere or the boiler would cut out in minutes!
I have checked the pressure to the gas valve which is actually 30mb!
The burner pressure is not givin a big reading approx 1mb although im not sure if this boiler has a zero govner, (i think not)
Baxi advised me to check the reading across the "modureg" which should be min 1vDC / max 9vDC.
Mine is read fine on CH side though a tadge over 9v (10)
On DHW side its staying on 10vDC and not modulating up and down! However this still doesnt make sense as this would suggest the water being too hot and not turning down.
Baxi said if these figures were not right then it would be the pcb however i would expect them to be lower rather than higher for the water to be cold.
(Also the burner is quite high which also makes no sense)
Any Baxi engineers out there can you tell me if any of this makes sense.
Agile said:
No the water isnt going down the flow pipe thats for definate!
All the boilers i have worked on so far have actually been Vaillants... to be honest i to have not seen that type of diverter in anyother Combi but as my experience is limited i wasnt sure if they were more out there.
Cheers
neilyp said:
You think right!
What is the working pressure? (incoming supply with burner on)
What is the burner pressure? (the test point above the one you've just tested with burner on)
What is the low gas burner pressure set to? (pull off one of the black leads with burner on)
baxpoti said:
i will re check again today,
when i checked yesterday working pressure was about 30mb (top of the gauge)
The burner pressure was about 2mb (although the burner appears to be on full this however may not be the case)
I couldnt get the boiler to fire with one of the black leads off, should i remove it once the boiler has fired?
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