Often low system pressure will cause pump issues.An undulating groaning sound is air in the system or a half empty system.

A 'tickling/hissing' sound is debris in the system rubbing against the impellor.listen for air rushing round the system, or black water A seized pump has seized for a reason.its still How to replace my central heating pump Pump Notes If there is no smell, and the capacitor looks ok, the shaft spins freely, 240v is present at the supply wires. A nasty, electronic burning smell, puts you back to If there is no evidence of an issue with the capacitor, give the control box a sniff. Read the specifications from the side of the defunct unit. A new one can be sourced from, for a few pounds. Any of these means the capacitor is dead. Splits and cracks and/or leaking of a sticky brownish fluid. GDSZ-50 series high and low temperature circulating pump can quickly shift function between heating and cooling, and using one same medium (conduction oil), it can match use with 50L double-layer. Isolate the power again and carefully lift out the white cylinder - being carefull of the wiring, and inspect it - you are looking for bulges in the casing, (note - anything under 200V AC, most likely means aīroken neutral wire - usualy 150v is typical) Failed myson compact circulating pump cp53 Tonight I tried the manual restart but it did not work, How to win work on MyBuilder Have a Myson CP53 water pump on an aged gas central heating system which is making myson cp53 manual a terrible racket but this. Initialy test that there is actualy 240v ac at the incomming supply wiring. Proventure invoices and estimates download. Inside you will find a white cylinder, a small control STEP 3, Power to pump OFF Unscrew the pozidrive screw on the top of the control box and carefully remove the cap. see How to replace my central heating pumpĪssuming it now turns freely, lets move on. If the force you can apply through a small screwdriver is not enough to free it, game over. The pump from behind with your hand if neccessary. Be careful not to strain the pipework around the pump, and support If it doesnt, apply some pressure, to see if you can break it free. Inside the body of the pump you will see the end of a small shaft with a diagonal slot in it - place a small screwdriver The screw too far or it will fall out, most likely dropping under the floorboards!Īnyway, assuming the water escaping is cool enough, remove the silver screw and This water most likely will be black, dirty, and hot.(this is what the cloth is for) Do not loosen a slight hiss ofĮscaping air should be heard, and water should drip from the screw. Then, With a Large flat bladed screwdriver, (or a 20p peice in a pair of pliers) loosen the silver screw in the center 1/2 a turn. So, Get a cloth, wet it with cold water and then wring it out so itsĭamp, not wet. STEP 1, Power to pump OFF Firstly, there is a caution to this - A seized pump will be full of scalding steam, be careful!.

Cp53 circulating pump manual