In message .com,
writes
For the past 6 months when I shower the water from the boiler keeps
going hot & cold(shower thermostatic controller). By searching the
group & few past posts Have mentioned the air pressure control switch.

It doesn't sound like an APS problem to me

Ed will be along in due course


Is this easy to replace ie turn elecy off, remove boiler casing & just
change over switch. Since the local suppliers cite them has not being
too expensive & the boiler manual shows easy access to the switch.
Or should I show caution being a gas Appliance. I'm generally quiet
mechanical.

Or secondly could my problem be something else ie barking up the wrong
tree.


--
geoff