Question about Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: fan runs continuously
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 ?
Posted on Feb 05, 2009
SOURCE: hi,i have a vaillant turbomax
Which turbomax, as there a two different models. The more modern one, with the brass CPL diverter valve, located at the front left of the boiler, was very prone sticking & jamming, this would restrict flow through the hot water circuit in the boiler, and cause cycling. Vaillant actually modified the diverter. You can identify, if it is the old type, as there is a very small hole in the middle of the diverter on the old ones, probable no more than 1mm-2mm wide. The modfied one, is much bigger approx 5mm wide. If old type, replace as this usally sorts the problem
Posted on Mar 03, 2009
SOURCE: We have a Halstead Ace
You need to get a qualified 'Gas Safe' engineer to check the Venturi in the flue, and clean it out. The other thing to look at is the igniters, clean them wirth emery paper as this boier relies on flame rectification (ignite and sense flame)
The other important aspect which also hasn't been mentioned is to check the inlet and working pressure (as i have had a faulty gas meter governor before)
Quite often the simple faults are overlooked and everyone goes for the PCB, It is doubtful it's a loose wire on the gas valve, The best advice is to get a gas engineer in and for him to call Halstead while on site.
Be very careful when working on your own gas boiler, as any mishaps, and your house insurance is void.
Posted on Jul 10, 2009
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