No hot water

[Julie Vickers]

Hi I have only had a slow trickle of hot water throughout the house for ages. My son tries to fix it and now I have no hot water at all.
A guy came to look and says it may be because there isn’t a cap on one of the pipes on the boiler. Could this be right?

 

[ZmicerMars]

No.
Probably somewhere ones valve is closed.
Can You take a photo from the bottom of the boiler?
so for example/

 

[Doggit]

How long has this been happening, and has it slowly got worse. Is it a combi boiler, or do you have a hot water tank. What did your son do, and did it stop straight after his adjustments.

If it's a combi, then the hot water exchanger may need descaling.

 

[Wildcat1961]

So what did this “guy” say regarding the missing test plug?

 

[Doggit]

The test plug is the one in the middle. The open one on the left should be going in to the outer part of the flue, which is the fresh air, but shouldn't be affecting the boiler operation at all; is there a thread on the outer rim of it. And which boiler is it.

 

[Wildcat1961]

The test plug is the one in the middle. The open one on the left should be going in to the outer part of the flue, which is the fresh air, but shouldn't be affecting the boiler operation at all; is there a thread on the outer rim of it. And which boiler is it.

Both are test plugs, one being combustion test point the other being integrity.
Both test plugs are push fit.