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I had drained the system when I replaced the valve in the first place. I did replace the aav but told the guy just to cap it if it evet leeks in the future. I traced the live incoming found 240 checked points mentioned in this thread and found all were correct voltage at correct times (with hot...

Ianmcd that was my bad been doing nights I knew it was to get rid of air just give it the wrong name thank you for correcting though as could cause confusion.(I had air admittance valve in my mind from changing a soil pipe).. If it's caped off (I caped it as soon as I saw it was leeking) does...

I forgot to mention when I replaced the parts mentioned it worked fine for 24 hours then the fuse blew so I went back out. I found that the air admittance valve on top of the boiler had failed causing water to get into the boiler. My guess is that as I'd drained the boiler to change the valve...

I replaced the motor and valve as the valve had leeked into the motor and set the wires on fire (the wtong fuse had been put in previous my guess is the leek had been there someone put s bigger fuse in so it didn't blow the fuse with water in the moror. I meant the componant layout of the actual...

So check between these two to see if mains voltage? Should there be mains voltage at the fuses also thank you

That is a really good idea I will check the mains voltage coming in at the PCB. out of interest is there any way i can get hold of a Component Layout for the PCB? many thanx

So between five and seven on the PCB? Is there anything else that could cause these to not get 240v other than the PCB? Many thanx again

0 mhms (the same as having both Leeds of the multimeter touching) thanx

Picasso, Sorry I understand that my posts can be difficult to read, I have dislexia and sometimes spell check does not fully help :-) thank you for spening the time to work out what I am trying to say. what did you bean by on times three? I checked the cable from the PCB to the motor for...

Just to try and clarify if there's any confusion with my explanation with the hall sensor test I carried out this is the test I did . The video shows baxi duotech Im working in potterton heat max. My findings were different to the ones in the vision oncc his problem was fixed. The white wire had...

The valve changes between centertal heating and hot water when voltage is provided from an external sauce to the motor. At the moment I have removed the motor so that the hot water can be used. If the motor is installed in the hot water position the hot water works, when the Ch is turned on the...

Hi all, I am working on a potterton heat max 28HE that has no hot water (hot tap runs cold but boiler fires up when the hot tap is on and hot water is sent to the valve) this boiler seems to be identical to the baxi deo tech? I have looked over many threads and had a convocation with a guy on...