Recent: Windows 11, Dell 5450, JBL Bluetooth headphones?

Mend > Home Heating Systems

Mend Grundfos 15-50 Pump Heating Hot System Heat

The pump appears to be operating when central heating is not on?

The water pump seems to be operating even when neither the hot water nor the central heating system is calling for heat. There are three levels marked on the pump and when either of them are selected the pump works except where the lever is just below the level II mark.
The pump is a GRUNDOS SELECTRIC , Type 15-50 about 4 years old.

Kenneth Stanton
October 2012
GrundfosGrundfos 15-50Heating, Home Heating SystemsPump Heating Hot System Heat
sounds like the end switch is stuck on a motorised zone valve, 2 port valves are common try tapping the valve and if the switch drops off pump will stop

higgy
October 2012
It's common in boiler pump keep going until cool down to set tenp

ltd
October 2012

Automatic Answer

We may have found other answers which could help you.

Click here for Pump Heating Hot System Heat

Related Questions ...

Mend 30 problem heat
2

glowworm betacom 30 problem?

Hello folks, boiler is 2 years old, had plate heat exchanger cleaned/changed/cleaned...dhw sensor replace... [Read more]
Mend boiler heating combi
1

what could be cause of heating problem?

i have an ariston micro combi 23 mffi boiler the pressure in system keeps dropping to zero , when i refill sys... [Read more]
Mend Siemens Boiler Heating
2

siemens RWB9 Programmer Fault?

i have a fully pumped system with zone valves , one for heating and one for hot water, my problem is that when... [Read more]
Mend heat hot rad
1

how many pumps can i use on heating system?

have 17 rads 16 gets heat +hot water 1 rad in attic not getting any heat do i need a 2nd pump and where would ... [Read more]
Mend boiler heating vaillant
1

Problem with my Vaillant eco tech 428?

I have got a Vaillant eco tech 428 heat only boiler which has been installed to a pressurised heating system. ... [Read more]
Mend boiler central heating gas boiler
1

my mains 24e baxi potteron make will not light up?

i have mains 24e gas boiler 2 weeks ago i found that hot was not as hot as normally it gives .i called the en... [Read more]
Mend boiler heating waterflow
1

second pump system?

hav recently installed a wood burning boiler stove , the system with adition of 2 gate valves to route and con... [Read more]
Mend boiler heating lockout
1

halstead ace high problem?

Hi, I have a problem with my hot water and heating. The Halstead Ace High boiler does not come on when a deman... [Read more]
Mend pressure boiler central
2

Pressure fault on Worcester 28Si II?

Hi. I'm repairing my boiler after it froze. I have the central heating working now (pump and flow sensor damag... [Read more]
Mend vaillant boiler diverter valve
2

Vaillant Turbomax 828 problem?

This is a strage one! I am not sure whether my diverter valve is on the way out or whether something else is c... [Read more]
Mend boiler heating heat exchanger
4

Bosch Worcester Highflow 400 no heating no hot water?

We've had an ongoing deries of problems which Brit.Gas are struggling with... 31 Dec: no heating/hot water - ... [Read more]
Mend boiler heating Worcester
1

Worcester 28i RSF Combi?

Got same problem can hear the system go on and can hear flow and a humming noise coming from the boiler but no... [Read more]
Mend heating radiators power flush
3

Howw can I fix my FERROLI DOMINA 80 E, radiators only partially warm ?

I have had the above above model in my house for some time, and have not at all been satisfied with the heatin... [Read more]
Mend boiler radiators sludge
2

heating?

hi i am having some problems with our central heating... to be brief we are in a three storey townhouse and a... [Read more]
Mend boiler central heating domestic hot water
4

Rayburn Driven Central Heating Problem - Upstairs Cold?

I have a Rayburn Gas CH system with a seperate pump. The cooker / boiler is in the basement kitchen with 3 ra... [Read more]
Mend central heating grundfos noise

Problem after changing ch pump on a grundfos pump plan?
Mend Grundfos Heating Pump

Can I stop the start-up noise from my Grundfos UPS 15-50?
Mend grundfos pump heating

Grundfos 1550 ch pump installation?
Mend problem domestic heating

Unexplained noises?
Mend grundfos pump ups

Turn dial which way to increase speed?
Mend heating pump sludge

pump diagram?
Mend air heating noise

how to air out of the central heating pump?
Mend central heating grundfos pump

grundfos selectric 15-50?
Mend noticed morning hot

grundfos MK 2 15/50 x 18 playing me for a fool?
Mend pump boiler heating

Grundfos Pump Plan wiring Centre part 96437234?
Mend blowing water leak

turbomax plus824e?
Mend Heating, Home Heating Systems

prv?

How to mend ...

Find out how to mend just about anything howtomendit.com for free repair help, information and advice.
Mend Home Heating Systems ...

Other models...

Grundfos UPS 15-50

Related Categories

Mend Convector Heaters
Convector Heaters
Mend Fan Heaters
Fan Heaters
Mend Oil Filled Radiators
Oil Filled Radiators

Topic

Grundfos 15-50 Pump Running Constantly - Help