My Baxi Combi instant 105e Boiler Gauge keeps dropping to zero pressure, after repressurising and during operation. It still provides hot water, but the temperature drops in & out.
It has been recently serviced and the pump was changed. The Engineer was also called back to look at the issue with the pressure gauge.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.