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.
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.