How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Andrew Smith Your Own Question
Andrew Smith
Andrew Smith, Home Appliance Technician
Category: Appliance
Satisfied Customers: 3633
Experience:  Gas cooker specialist
46681511
Type Your Appliance Question Here...
Andrew Smith is online now

Just checked my boiler and needle is on red. Normally in green

Resolved Question:

just checked my boiler and needle is on red. Normally in green area between 1 and2. Also think it is dripping outside overflow. Help!!
Submitted: 1 year ago.
Category: Appliance
Expert:  Andrew Smith replied 1 year ago.
If it is dripping outside then you will need a new PRV fitting.You should try and repressurise the boiler and keep it going until Monday when it will be cheaper for an engineer
Customer: replied 1 year ago.
how do I repressurise the boiler? Do I open the water inlet valve. I have done this once before when the pressure was low and the needle then began to rise but needle is in red area. Should the boiler have automatically cut out? I am 67 years old and know nothing about a boiler.
Expert:  Andrew Smith replied 1 year ago.
Depends on the make and model, usually the heating shuts off less than 0.25bar.See if you can get the pressure back up to 1 bar to get your heating back on until Monday
Customer: replied 1 year ago.
how do I get the pressure back up pls?
Expert:  Andrew Smith replied 1 year ago.
Is there a silver flexible pipe attached to the copper pipework under the boiler?
Customer: replied 1 year ago.
silver flexible pipe is on side not underneath. Had switched boiler off in a panic when it was in the red area. Needle has dropped back slightly. Will it continue to drop back if I leave it off? Needle near 3.
Expert:  Andrew Smith replied 1 year ago.
If at 3 bar then the valve will drip outside as this is the safety valve.When you turn it back what pressure does it run at?
Expert:  Andrew Smith replied 1 year ago.
It should be set at about 1.5bar
Customer: replied 1 year ago.
what do you mean by turn it back? Do you mean turn it back on as it is off at the moment. It is normally at 1.5
Expert:  Andrew Smith replied 1 year ago.
Yes, turn it on and tell me what happens to the pressure gauge
Customer: replied 1 year ago.
needle going back towards red
Expert:  Andrew Smith replied 1 year ago.
Has the filling loop been left on?Is it still dripping outside?
Customer: replied 1 year ago.
needle in red area and outlet still dripping
Expert:  Andrew Smith replied 1 year ago.
So the needle drops when on but rises when off?
Customer: replied 1 year ago.
No. Other way round. It has risen now it is back on. It only dropped back a little when I switched it off. If it would drop while on I would be much happier and warmer.
Expert:  Andrew Smith replied 1 year ago.
That's ok due to the pump being on, it creates system pressure.It is only a problem if near 3bar, then it drips outside.You may have a circulation problem down to a number of issues like water quality, but you should be safe to leave on until you can get someone out Monday.
Customer: replied 1 year ago.
Are you sure? I don't want to damage boiler and end up with a costlier call out as I am on a small pension. The other worrying thing is that the temp is at 70 and rising
Expert:  Andrew Smith replied 1 year ago.
Turn down the thermostat on the boiler to 3/4 if you are worried.There are many built in safety features to prevent your boiler being dangerous.
Andrew Smith and other Appliance Specialists are ready to help you