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If the inline pump is not working no hot water will flow into your radiators. The pump pushes the water in the lines to create a water flow. Increasing the pressure will not help in this case. I recommend you put the pressure back down as it usually is preset when the boiler is installed. My pump is about three feet back of the boiler on the intake line. If you don't know what you are doing I recommend getting a repair man as you could create more problems by over heating the boiler its self and blowing the electrical parts up.
It sounds to me like the outside air intake (your boiler requires outside air for combustion) is plugged. Bird's nest, maybe? Leaves? Spider webs? Have the plumber check outside AND where the intake air connects to the boiler.
Hi - hope someone can help. I have a VOKERA EXCEL 80SP combi boiler and been without hot water/central heating for two days. The pilot light is on, the fan is on, but boiler not triggering once the hot water tap is turned on.
Hopefully someone come to look at it today but hoping for some advice. Anyone else had this problem?
Water logged expansion tank ( ruptured diaphram in tank) or wrong size tank. This caused the excessive pressure in the system causing the relief valve to open. Also, air in the system causing flow to stop, Both conditions will cause boiler go out on safety.
I have a similar problem with this boiler. When CH on, boiler overpressurises, (check relief valve outlet) You will then lose water from the CH loop and will have to repressurise when the CH loop cools. The problem is most likely caused by a loss of air from the expansion tank, which will need re-charged. This is not a big job as it has a standard tyre type valve connection but needs an accurate pressure gauge. Probably best left for plumber.
the air pressure which does not controll the fan it is a safe guard for the gas/oil burner to ignite nowing that the fan is running ( air switch normaly negative /positive prssure n/o,n/c circuits. it could be that your boiler is designed for a cant think of techinacal name but when in centre of house/factory and has 1 or more boilers connected to flue etc the fans run when only power to boiler is on , non vented system ? it could be a simple link to remove in controll panel i would phone technical help for manufacture ?
It's got nothing to do with carbon monoxide. CO means the boiler is in combustion test mode, that's all (and in this case -- long since fixed, I imagine, but other people will no doubt find this page in the future -- failing). Vokera could probably have made this clearer, but hey.