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How to replace a Baxi 105E microswitch?

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paul_cragg

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Hi
Looking to replace the Baxi 105E microswitch but Worried about getting the white connectors off without damaging the wiring.

has anyone done it and if so is there a trick to getting the connectors off?
 

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RayW said:
Flat spade. Just tug *** Interpart Baxi Combi 80E 80Maxflue 80ECO 105E & 105HE Microswitch 248067 5039177618577 | eBay - https://www.ebay.co.uk/itm/124271853887?chn=ps&norover=1&mkevt=1&mkrid=710-134428-41853-0&mkcid=2&itemid=124271853887&targetid=1140163971809&device=c&mktype=pla&googleloc=1006751&poi=&campaignid=12126090633&mkgroupid=117623829555&rlsatarget=aud-629407026665:pla-1140163971809&abcId=9300481&merchantid=119037449&gclid=CjwKCAjwx6WDBhBQEiwA_dP8rSJaSp4YsQ_BvUA9DsVqEMqmy1OjMlAlk8rVnPSNyVJOOXtNJ4lojhoC7mIQAvD_BwE
Click to expand...
Thank you for your response, I have now changed the microswitch which I was hoping would get rid of my intermittent 60 degree error (low pressure or pump fault) pressure is at 1.5 bar and I can hear the pump. Basically I get hot water fine and then at some point after, the error 60 comes on, I have also changed the diaphragm and greased the push rod..not sure what is left to try
 
Gasmk1 said:
They are just covered spade connectors so just either grab and wiggle them or use a flat screwdriver to lever them up
Click to expand...
Thank you for your response, I have now changed the microswitch which I was hoping would get rid of my intermittent 60 degree error (low pressure or pump fault) pressure is at 1.5 bar and I can hear the pump. Basically I get hot water fine and then at some point after, the error 60 comes on, I have also changed the diaphragm and greased the push rod..not sure what is left to try
 
PETE 123 said:
Pull off by hand or pliers. With power off.
Click to expand...
Thank you for your response, I have now changed the microswitch which I was hoping would get rid of my intermittent 60 degree error (low pressure or pump fault) pressure is at 1.5 bar and I can hear the pump. Basically I get hot water fine and then at some point after, the error 60 comes on, I have also changed the diaphragm and greased the push rod..not sure what is left to try
 
ShaunCorbs said:
You need to rebuild the whole diverter valve

As I guess you’ve replaced the front diaphragm washer

www.ebay.co.uk

Baxi Combi 80E 105E 105HE Diverter Valve Repair Kit 248061 248062 NEW | eBay

We will always help you to have a 100% positive happy buying experience. made with love by.
www.ebay.co.uk
Click to expand...
You are correct, I replaced the diaphragm which did have a rip, when you say build the diverter, I assume you mean only on the DHW, as not having any symptoms on the CH. Do you mean replacing the spring, mushroom and pushrod as in the attached link to the service kit: Baxi combi 80e & 105e DHW Hot Water Diaphragm, Repair Kit with plate 5111137 7824400586123 | eBay - https://www.ebay.co.uk/itm/Baxi-combi-80e-105e-DHW-Hot-Water-Diaphragm-Repair-Kit-with-plate-5111137-/273291486363?_trksid=p2349624.m46890.l49286
 
The pump proving switch isn’t on the hot water diaphragm it’s the one behind that one

what’s the fault other than the code

watch the rear microswitch when the fault happens
 
ShaunCorbs said:
The pump proving switch isn’t on the hot water diaphragm it’s the one behind that one

what’s the fault other than the code

watch the rear microswitch when the fault happens
Click to expand...
After every 4th or 5 th time the hot water has been run, at some point, the fault light comes on. I don’t believe it is whilst the hot water is running or straight after it has run but at some point after. If you leave it with the 60 light flashing, eventually it will go off. Thinking the pushrod might have been slow to retract but have watched it and it seems ok, did clean and grease it.
 
The front diaphragm doesn’t control the pump the rear one does
 
That’s the pump proving one so providing your info is correct should fix your problem or it’s a weak pump
 
Sorry, I have one last quick question, when I replaced the DHW diaphragm, I just turned the Mains off and ran the hot tap until there was no more water. Am I able to do the same when replacing the CH diaphragm or do I have to drain the boiler?
 
Have to drain the heating system if your upstairs and above the radiators only need to drain the boiler but if your downstairs need to drain everything above the boiler
 
ShaunCorbs said:
Have to drain the heating system if your upstairs and above the radiators only need to drain the boiler but if your downstairs need to drain everything above the boiler
Click to expand...
Thanks for all your help, so just so I am clear if you are replacing the DHW diaphragm you just need to turn mains off and run tap but if you are changing the CH diaphragm you have to drain the boiler? I will also get some fernox inhibitor when I do drain it down
 
Correct and anything above the boiler
 

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