Shower Pumps - Standard Type Running Continuously
If a 'Standard' type MONSOON or SHOWERMATE shower pump runs continuously even when all outlets are closed we recommend the following procedure be followed to diagnose the cause.
Diagnosis Procedure
1. Isolate the pump water inlets or outlets
i). Close the isolation valve (or valves if its a twin head pump) on either the inlet or outlet side of the pump - use the lever valves in the inlet or outlet pipework (if fitted), otherwise use the isolation valves built into the pump anti-vibration hoses (if fitted).
If no lever valves are fitted to the system pipework and your pump model does not feature isolation valves in the anti-vibration hoses, then the system will need to be drained down and isolation valves fitted before proceding.
ii). If the pump stops it will be due to a system fault, for example water flowing from a shower head, leaking toilet cistern valve etc. causing the pump to activate. The leaking appliance or outlet should be repaired.
iii). MONSOON - If the pump continues to run, leave the isolation valve(s) closed and proceed to step 2.
iv). SHOWERMATE - If out of warranty, replace pump, if the pump is within warranty contact TechAssist for guidance.
2. Remove Reed Switch(s)
i). Identify the 'hot water' side of the pump (if a twin head pump) and carefully remove the plastic encapsulated reed switch.
ii). Move it away from the brass body assembly (leave the cable connected).
iii). If the pump stops then the internal flow switch/magnet carrier is stuck in the 'raised' position - disassembly and repair / replacement of the flow switch will be necessary.
iv). If the pump continues to run, leave the reed switch disconnected and proceed to Step 3.
3. Remove Reed Switch(s)
i). Carefully remove the reed switch from the 'cold water' side of the pump (if a twin head pump).
ii). Move it away from the brass body assembly(leave the cable connected).
iii). If the pump stops then the internal flow switch/magnet carrier is stuck in the 'raised' position - disassembly and repair / replacement of the flow switch will be necessary.
iv). If the pump continues to run, leave the reed switch disconnected and proceed to Step 4.
4. Electrically isolate the pump
IMPORTANT: Electrical tests must only be carried out by a competent person.
For voltage detection or measurement only appropriate test equipment should be used.
i). Remove the plastic pump control cover (4 x screws).
ii). Remove the two wires from the S2 (reed switch) terminals (terminal arrangement of a twin head MONSOON pump shown).
iii). With fingers and tools clear of the pump re-connect the electrical supply to the pump and switch on.
iv). If the pump does not run then the disconnected pump reed switch is faulty.
v). If the pump runs, leave the reed switch disconnected and proceed.
vi). Electrically isolate the pump.
IMPORTANT: Electrical tests must only be carried out by a competent person.
For voltage detection or measurement only appropriate test equipment should be used.
vii). Remove the two wires from the S1 (reed switch) terminals (if a twin head pump).
viii). With fingers and tools clear of the pump re-connect the electrical supply to the pump and switch on.
ix). If the pump does not run then the disconnected pump reed switch is faulty.
x). If the pump continues to run with the reed switch (single head pump) or both reed switches disconnected (twin head pump) then the pump PCB is faulty.
For further guidance please contact the Stuart Turner TechAssist team here.