Gas heating low water pressure ?

2qk4u

Just tried to start the Gas Heating for the first time in months and the reading for the water is on zero and should be at 2 bar, I tried to fill it but its not filling. Could it be air locked ? if so how do I fix it ?

JohnnieK

If there was an airlock you should still get some reading on the pressure gauge. Have you noticed any leaks? are you leaving the top up valve open long enough? 2bar is very high for a system too, it should only be 1bar cold fill.

2qk4u

When I turned the valve to fill it I heard the water move and could feel it starting to flow, then it just stopped. No sign of a leak. I left it on foe about five minutes but its still on zero.

The Barron

2qk4u wrote: »

Just tried to start the Gas Heating for the first time in months and the reading for the water is on zero and should be at 2 bar, I tried to fill it but its not filling. Could it be air locked ? if so how do I fix it ?

check again they may be two valve that have to be opened

1 bar (cold) should be plenty of pressure

JohnnieK

Can you take any pictures of the filling point and the boiler and gauge and post them?

2qk4u

The Barron wrote: »

check again they may be two valve that have to be opened

1 bar (cold) should be plenty of pressure

Ive topped it up before using this valve/tap.

smoochie06

The Barron wrote: »

check again they may be two valve that have to be opened

1 bar (cold) should be plenty of pressure

Mine is an ariston and there is 2 valves to be opened so it could be that. Also if mine goes below a certain pressure (not sure exactly what pressure) it wont fire. OP does yours fire ? Just wondering because maybe there is something wrong with the gauge.

2qk4u

smoochie06 wrote: »

Mine is an ariston and there is 2 valves to be opened so it could be that. Also if mine goes below a certain pressure (not sure exactly what pressure) it wont fire. OP does yours fire ? Just wondering because maybe there is something wrong with the gauge.

Yeah fires up and runs ok.

smoochie06

2qk4u wrote: »

Yeah fires up and runs ok.

Sounds like the gauge could be gone. I could be wrong though. Better to get a professional to look at it.

JohnnieK

smoochie06 wrote: »

Mine is an ariston and there is 2 valves to be opened so it could be that. Also if mine goes below a certain pressure (not sure exactly what pressure) it wont fire. OP does yours fire ? Just wondering because maybe there is something wrong with the gauge.

0.8bar is the pressure if it's an Ariston CLAS. (Great boiler)

smoochie06

JohnnieK wrote: »

0.8bar is the pressure if it's an Ariston CLAS. (Great boiler)

Thats the one. Very happy with it.

2qk4u

Am I right in thinking that if the pressure is too low it will turn off ?

smoochie06

2qk4u wrote: »

Am I right in thinking that if the pressure is too low it will turn off ?

Thats the way it is with mine. Not sure about other systems. See the manual and it should tell you.

2qk4u

I ran the heating for about twenty minutes and all seem to be normal apart from the gauge reading zero still. May just be a faulty gauge although the system is only 3 years old.