Boiler - W/B Greenstar Danesmoor 18/25 external. Set to max on boiler.
Ok bit of background our old plumber fitted a new boiler but he left without actually finishing adding a few rads and other jobs leaks etc which i fixed myself.
Problem has always been lack of heat in rads since he fitted new boiler
Before i throw in the towel and call in someone who knows what they're doing. Appreciate some advice.
Flow and return pipes next to CH pump and zone valves are hot. Can't touch for more than few seconds before ouch.
Have some cheapo pipe stats that read 50 degrees just under on flow and return, both pipes feel about equal in temp.
CH pump is about 2 years old, seems ok. Recently drained system to remove an old CH pump at other end of house replace with inline pipe. Refill and bled all rads, still same.
It's been about the same or maybe worse since sh't plumber fitted new boiler and did a runner before finishing the job of getting it working ok. He did say at the time he lost a few labels on flow and returns to some of the pipes.
One other thing i noted was when i removed a rad from top end of house (bungalow on two levels (3ft rise) i pushed alot of black sh't out the pipes just using the charge loop to clean out return.
Should there be a considerable difference in heat between my flow and return pipes?
Any pointers welcome...
Just to add i've noticed in the lounge the two rads are hotter on the return valve, they are standard valves not TRV's but the manual valve end is cooler than the blanked ends. Does this mean this part is flowing the wrong way?
In fact the hottest rad in the house is flowing in through the manual valve as i expect, the rest are much cooler and flowing other way.
When i say cool i can easily leave my hand on the rad for 20seconds (my cheapo IR gun says rads are 30degrees
Ok bit of background our old plumber fitted a new boiler but he left without actually finishing adding a few rads and other jobs leaks etc which i fixed myself.
Problem has always been lack of heat in rads since he fitted new boiler
Before i throw in the towel and call in someone who knows what they're doing. Appreciate some advice.
Flow and return pipes next to CH pump and zone valves are hot. Can't touch for more than few seconds before ouch.
Have some cheapo pipe stats that read 50 degrees just under on flow and return, both pipes feel about equal in temp.
CH pump is about 2 years old, seems ok. Recently drained system to remove an old CH pump at other end of house replace with inline pipe. Refill and bled all rads, still same.
It's been about the same or maybe worse since sh't plumber fitted new boiler and did a runner before finishing the job of getting it working ok. He did say at the time he lost a few labels on flow and returns to some of the pipes.
One other thing i noted was when i removed a rad from top end of house (bungalow on two levels (3ft rise) i pushed alot of black sh't out the pipes just using the charge loop to clean out return.
Should there be a considerable difference in heat between my flow and return pipes?
Any pointers welcome...
Just to add i've noticed in the lounge the two rads are hotter on the return valve, they are standard valves not TRV's but the manual valve end is cooler than the blanked ends. Does this mean this part is flowing the wrong way?
In fact the hottest rad in the house is flowing in through the manual valve as i expect, the rest are much cooler and flowing other way.
When i say cool i can easily leave my hand on the rad for 20seconds (my cheapo IR gun says rads are 30degrees
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