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i have had loads of problems with CT1 clear going yellow

They test my levels once a year. Lack of sunlight is part of my problem. Sunlight makes it much better.

i take 5000 ui of vit D everyday. have been for 10 years due to psoriasis.

the rear hose doesn't seem to get very much attached to it on the boilers where i have the problem. It seems to be the front hose that the debris attaches itself to more. There must be something to do with the higher temperature .

Every boiler has poor design issues. But this hose is really easy to remove and clean at service. I always make sure i don't squeeze it before i have got the bottom connection off. I have quite a few that i service but only a couple have the problem with the hoses and both of these systems have...

How long have you had the underfloor switched on for each 24 hr period? Reading between the lines it seems like you might be trying to operate it like radiators!

Normally you would lay karndean onto the screed. With underfloor heating you normally latex it first so it can absorb the thermal movement. Don’t know why someone told you to use ply and hardboard. as for testing the extra heating. With underfloor you need to run it for a minimum of 18 hrs...

should have been screeded with karndean straight on top of screed. You would be best to rip the flooring out. Have another 20mm of poured screed applied on top of the existing screed and then put you finish straight on top. Your chipboard and ply are acting as insulation above the heat source...

i have fitted hundreds of underfloor systems and many in barn conversions with vaulted ceilings that are sometimes 50ft high. Never had any issues. But it does depend upon your floor coverings. If you have wooden floors then you are going to struggle badly, unless you are running flow temps near...

you have power to the connections on the bottom right. was the 5amp fuse ok located to the right of the wiring?

On an oil combi it's always worth while using the hot water function. set it turn off over night and if you are out all day. it needs to be turned on 20 mins before you want hot water though. It will save you about £50 to 75 per year and it is also good for the burner ( means that it won't be...

which burner do you have , riello or bentone ? check that the slave tank and main exchanger are full of water. if they get an air pocket at the top it will continue to try and heat slave tank as it thinks it cold. double check by turning the hot water stat to min. should then change over to...

as the rads went very hot on max rate, it would seem that the radiator flow temp maybe too low. we normally set them about 70. maybe a setting problem with hive

photocell requires the burner to be in a combustion box of some type that is completely dark when flame extinguished. if there is a small amount of light then fan will continue to purge are firing. this is a safety feature in case the oil pump solenoid fails and oil continues to flow

looks like a altech. supplied by grahams plumbing merchant

change it to 4 and they maybe enough to force it to the last rad. if not increase it another one. Increasing boiler output to 100% won't increase gas bills, all it will do is speed up the time the boiler takes to get the rads up to temperature

alter pump setting to 3 which is factory default and see how it performs. if it doesn't pump around enough then increase it. or you could try it on 6 and then drop it down. change heat output 100%. the only issue you get with the higher pump pressure is noise. Always best to set it at a rate...

Sounds like the boiler needs the pump setting changed from 3 to 6.( when in max rate mode the pump is on setting 6) this is changed in 3-d1. about page 48 in the manual. I know you had a query about the syphon fill mode. this can be switched off. 4-A2 page 48. this also explains what...

As i said earlier. Worcester engineer has checked that the boiler is set up correctly. He will not check the rest of the system as thats not their responsibility. The problem will lie with one or all of the following. system balancing, auto bypass setting,system blockage. My guess would be...

why have you not called the original installer back to setup the boiler correctly?