Central heating system loosing pressure

[chris301up]

Integral casing:
Many appliances have cases, which in addition to being decorative, function as a part of the combustion circuit and form an important seal around the gas carrying components e.g. burner, combustion chamber, gas valve etc. If removing the case involves undoing a number of screws, this normally means it is a functional case and it should not be removed by the consumer or a person who is not Gas Safe registered.

The warnings against unqualified casing removal are for your own saftey as you do not have the means to test whether the combustion circuit has been affected.

As I stated in the post there aren't any screws to be undone. The front just pulls down and the casing just slots on to flat tabs. I cannot say anymore and fully understand what you're saying otherwise.

 

[Gasinspect]

I have just had a guy round to have a look at the ongoing issue but he can't seem to locate the expansion vessel recharge valve anywhere.

The only one he can find is located on top of the pump unit, which is the same as a tyre valve, but there is insufficient room to get a air pump to attach to this as there simply is insufficient room

Does anyone know where this may be located or is this the only one within the system?

Doesn't sound like an experienced repair engineer. That is air vent on pump, nothing to do with expansion. Did he try reseting the prv by turning the top? It is spring loaded and sometimes debris stops it shutting. But for a minimum charge would be worth replacing it anyway.

 

[gmartine]

As I stated in the post there aren't any screws to be undone. The front just pulls down and the casing just slots on to flat tabs. I cannot say anymore and fully understand what you're saying otherwise.

Then your screws or fasteners are probably missing.