Is my Baxi 105HE Instant realy loosing water ??

[diyisfree]

Have a problem with my father in laws 105 HE Inst ( i know go on, get over the laughing fit) Anyway, loosing presure, or is it ?

The gauge is reading 0 so top it upto 1.5 and away it goes. 10 mins later 0 again. I noticed their was a slight drip for the relief valve so i twisted it till it let water pass then let go to dislodge any ****e that may have been preventing a seal.

Fired up the boiler for another 10 mins. Noticed it was still dripping so the valve was replaced. The pressure issue is still the same BUT i have noticed the boiler still runs ok and heats the rads ok even with no pressure.

Also, if i top up to 1.5 bar, once the boiler fires up and runs for 10 mins or so the relief valve dumps a load of water out? Could this be simply a faulty gauge ? and its reading low so i am over filling the system and the valve is dumping excess pressure ?

 

[clf-gas]

Sounds like you have hit the nail on the head.

 

[diyisfree]

cheers clf-gas.

is there a way of checking this without replacing the gauge ? Or would you simply fit a new one and have done with it ?

 

[Baxmax]

You need to check your expansion vessel.

 

[diyisfree]

Baxmax,

The boiler is just under 2 years old, would you expect a problem with this so soon ?

Am i looking for a leak ?

 

[Baxmax]

I had a light bulb in one room in our house that lasted 12 years,whilst in another room the same model and make of light bulb only lasted two months

 

[GasMan1965]

Def the expansion vessel !!!

 

[namsag]

baxi have had a problem with expansion vessels on instants, isolate boiler dump the pressure and pump expansion vessel up to 1 bar then open isolating valves and set system pressure to 1bar

 

[Baxmax]

There is a chance it may be the secondary heat x

 

[Baxmax]

But it is easy to check the xp vess.

 

[curious_mal]

We have a 105e instant and the first ev lasted a mere 18 months before popping its clogs.

 

[diyisfree]

I had a light bulb in one room in our house that lasted 12 years,whilst in another room the same model and make of light bulb only lasted two months

Cheers bax. Very helpful thanks.

I shall tell him to get a boiler guy in. I aint messing with it.