Hot water not hot,Trapped Air in Cylinder coil?

[steven0151]

Hi

Please be gentle as this is my first post. Ever since the boiler was serviced which included boiling the kettle and pouring the boiling water into the boiler ideal icos HE15 to clean it (don't think I will be using the guy again) the hot water doesn't really get hot despite the middle pipe totally roasting. I have checked the loft and both the main tank and smaller tank has plenty of water and the ball lets more water in when I press it. I am not sure what is going on but something isn't right. We can have the hot water on for three hours and the water doesn't get above 40c despite the attached honeywell thermometer set to 60c and the water coming out is warm but hardly hot.

I have attached the pic to try and explain so bear with me the middle pipe is beyond hot and you cant even touch it for more than a second. I have set the pump to max to try and tease out any trapped air when I open the vent thing on the middle pipe not much air comes out only very hot clear water. The bottom pipe which i imagine is the output is just above warm and you can hold that for a while before it get uncomfortable to touch.

I have been researching for a few days now as it is bugging me and think it may be trapped air or gunk and would welcome any suggestions for a fix.

thanks in advance

 

[John506]

If you turn the cylinder thermostat up past 60 degrees does the hot water temp increase?

 

[oilhead]

Have you tried partially closing the balancing (gate) valve on the return? The boiler may be shutting down because the return is coming back hot.

 

[ianmcd]

erviced which included boiling the kettle and pouring the boiling water into the boiler ideal icos HE15

That is the correct thing to do when cleaning the condensate trap so dont go blaming the service engineer, on the three port valve (the silver box in your photo) there is a lever on the end nearest the floor, slide this accross and the valve is then in the manually open position and see if the HW pipe now gets hot

 

[steven0151]

Thanks for the replies. I stand corrected with the service chap if he would have explained it may have made more sence as I thought he wanted the kettle on for a brew I think I may have solved it the value on the pipe by the silver box wasn't fully open as was a bit stuck but ive managed to fully open it and both pipes are pretty hot. The engineer must have checked they weren't sticking and didn't fully open it. Fingers crossed it sorted. Thanks for the suggestions

 

[ianmcd]

Sounds like the synchron motor is about to give up on your valve, nothing to do with the boiler service , if it sticks again get it replaced, not a big or expensive job, you shouldnt have to change the whole valve but has been known

 

[ianmcd]

The engineer must have checked they weren't sticking and didn't fully open it.

Second time you have blamed your service engineer, your service engineer would have no reason whatsoever to go anywhere near this valve unless you had mentioned some kind of problem

 

[steven0151]

The engineer must have checked they weren't sticking and didn't fully open it.

Second time you have blamed your service engineer, your service engineer would have no reason whatsoever to go anywhere near this valve unless you had mentioned some kind of problem

The engineer must have checked they weren't sticking and didn't fully open it.

Second time you have blamed your service engineer, your service engineer would have no reason whatsoever to go anywhere near this valve unless you had mentioned some kind of problem

He did as immersion heater trips when you turn it on so he was fiddling around in the cupboard for a bit. So he did have reason and for the record It's not a matter of blame it is stating a fact.

 

[dilalio]

Boiler service = safety check.

 

[AGAS]

He did as immersion heater trips when you turn it on so he was fiddling around in the cupboard for a bit. So he did have reason and for the record It's not a matter of blame it is stating a fact.

i wonder what some customers think about me if dealing with people like this one

 

[dilalio]

Last man in AGAS... It's like a frikkin curse sometimes

 

[AGAS]

was he there to fix your system when doing a service ? sounds like you want champagne for beer money