Question about Grundfos JPS4 1 HP Pressure Booster Pump

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Central heating pump is very hot radiators not

Central heating pump is very hot radiators not warming up hot water warming up fine

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Need to bleed radiators or pump impellers have damage

Posted on Feb 02, 2010

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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2 Answers

Engine over heats


ck your water pump, sounds like no water movement,

Aug 18, 2012 | 1997 Nissan Sentra

1 Answer

03 Chrysler Voyager heat not warming up. Heater core good, new water pump, not leaking coolant, A/C works fine. Any suggestions?


Perhaps the thermostat is stuck open. That would cause the water to circulate constantly and not trapping it in the block long enough to heat up. While your vehicle is cold, remove the radiator cap. Have someone start the car. You should not see water circulation thru the radiator. That should only happen when the hot water in your block is exchanged with the cooler water in the radiator.

Oct 05, 2011 | 2003 Chrysler Voyager

1 Answer

On a back boiler central heating system my hot water works fine but cant get my central heating working i have changed the pump there are no motorised valves on the system i have checked the the expansion...


Hi,
In most cases problems with the circulator pump boil down to two problems.
The most common is air in the lines causing an air lock.
The next problem is that the pump gets stuck and is not running even though itmay be hot and seem to be running. In this cause the pump can sometimes betaken apart, cleaned and it will work, but usually it needs to be replaced.

Here is a tip that I wrote that will explain circulator pump problems in moredetail.

Heating Circulating Water Pump Problems

heatman101

May 09, 2011 | Water Heaters

1 Answer

Central heating pump is very hot radiators not


Excellent - glad it helped .. Please feel free to leave feedback

Feb 01, 2010 | Grundfos MQ3-35 3/4 HP Pressure Booster...

1 Answer

St6400c thermostat wont run the central heating independantly


This does not sound like a thermostat problem. I would be looking for a zone valve or circulator pump problem.

Nov 05, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

No central heating. Bled radiators but still nothing. Hit Re-set switch and now no central heating or hot water. Help!


check the pump,circulation not working will stop boiler at flow switch.
if pump working then check flow switch

Oct 09, 2009 | Audiovox Bosch 718 World Cellular Phone

1 Answer

Parkray Cumbria efficiency problem


Some circulation pumps have a 3 phase mixing valve (cold,warm,hot) to regulate the water pressure in the building; no way to know unless you trace the plumbing. Basically, the hot water temperature could be lost because the circ-pump is cooling it with the cold water supplied to it. This is used to balance the pressure (aka Pressure Balancing Circ-Pump), so heater is really working overtime to heat the water. If the pump has two in and one out that's more than likely your problem; but you should consult a "old-school" plumber in your area.

Nov 25, 2008 | Water Heaters

1 Answer

COMBI BOILER /CENTRAL HEATING


the boiler should modulate to controll the radiator temperature but the central heating will go off whilst you are drawing hot water

Nov 13, 2008 | Water Heaters

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