Trouble shooting for Pumps and Valves

1). Cold Radiator.If the pump sounds like it is running but one or more radiator stays cold, there may be an airlock in the pump. Find the pump and identify the bleed screw. Place a bowl under the pump and open the bleed screw to allow the air out. As soon as the water appears at the screw, tighten it up and retest the system. Croydon Plumbers can do this task.2). Rotor Jammed.Sometimes the rotor in the pump will stick and although you can feel some vibration at the pump, the mechanism will not be running. Some pumps have a cover screw to undo and allow access to the pump spindle. Most times turning with a screwdriver will free the spindle.3). Pump Types.There are three types of circulating pump:Single Speed (fixed head) and Variable Speed. While a variable speed unit is slightly more expensive it is more flexible which justifies the extra cost.4). Replacement Pump.Always replace a pump with the exact same pump. (take the old one with you to compare if possible). 5). Pump Speed Adjustment.To adjust the speed of a central heating pump there is usually a small rotary switch on the pump that can make adjustments.6). Valve Replacement.Control valves are electrically driven. Before replacing always check wiring and control unit are ok first.7). Impeller.Sometimes the pump impeller will jam and fail to pump. Before anything else always check this first as any blockage can usually be removed by hand fixing the problem. If replacement is required make sure that the system is free of all debris prior to fit.8). Tools.If the pump is fitted between two large nuts you will need two large adjustable wrenches to change it. Make sure not to overtighten. A Croydon Plumber carries these tools.

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Postcode Areas Covered:

(-CR0, -CR1, -CR2, -CR3, -CR4, -CR5, -CR6, -CR7, -CR8, -CR9) Croydon, Addiscombe, Selhurst, Shirley, Addington, New Addington, Forestdale, Waddon, Beddington, Sutton, South Croydon, Sanderstead, Selsdon, Caterham, Chaldon, Woldingham, Whyteleafe, Tandridge, Mitcham, Beddington Corner, Merton, Coulsdon, Chipstead, Woodmansterne, Reigate and Banstead, Warlingham, Chelsham, Farleigh, Thornton Heath, Purley, Kenley