Radiators are cold and hot water is available

[slganapat]

We have Potterton boiler with a hot water and cold water tank in the bathroom airing cupboard and an expansion tank in the loft. There is a pump connected to the boiler. The pump is a Wilo Gold 50 pump. which takes water to the radiators. i think the hot water is not thru pump it comes directly from the tank.

Now the problem is after not having any heating and hot water for all the summer, the radiators are not getting heated up now. the hot water seems to be available. But the radiators are not getting any heat. We bleeded all the radiators once and they seemed to work. Again after a couple of days they are not working. The pump is hot when the radiators are hot. the radiator nearest to the pump and tank is getting heated up but not any other radiator.

 

[seco services]

is the boiler firing up when heating on and wall stat turned up ?

 

[75pete]

Start by checking your pump.
With the heating on, remove the bleed cover on the front of the pump to check its turning.
Has your system got a 3way valve, it allows heating water to your hot tank and once hot shuts it off.
If you have one of these it could be stuck and not letting heating water to your rads.

 

[stanislav]

What kind of fuel you burn with that boiler?

 

[seco services]

What kind of fuel you burn with that boiler?

rocket fuel. what does that matter

 

[slganapat]

It is a gas boiler. When we use a lot of hot water the boiler fires up to refill the hot water tank

 

[seco services]

we know that. what about the heating ?

 

[seco services]

is the boiler firing up ?

 

[slganapat]

The radiators are not heated at all...i mean the boiler fires up only for the hot water but not for radiator heating

 

[seco services]

have you one of these

or

you said this
The pump is hot when the radiators are hot. the radiator nearest to the pump and tank is getting heated up but not any other radiator.


so how do you work this out if the boiler isn't firing up ?

 

[slganapat]

yes i have one valve like the first image and like i said before the radiator nearest to the tank and the pump is heated only when the boiler is working for hot water and the boiler fires up only when a lot of hot water is used... we switched on the hot water and the central heating only a week ago after a long switch off for summer. But the CH was not working so we bleeded all the radiators. this seemed to help and the radiators were heated for a couple of days. af ter 2 days the radiators are not getting heated up even if the CH and HW has been on( as per the timer been set to 24 hours). We get hot water continuously. When we run a bath the boiler fires up and the pump seems to get heated up and the radiator immediately next to the pump. When there is enough hot water every thing stops.

 

[seco services]

on the end of the valve is a lever push the lever across and it will clip into a slot, will the heating turned on and stat turned up. does the boiler fire up ?

 

[slganapat]

There is a lever .But the lever seems to be stuck, it does not seem to move.[/list]

 

[seco services]

if the lever is not got any movement sounds the the spindle is seized in the valve.

has the valve got any names numbers on the valve cover at all ?

 

[slganapat]

It is a Landis & Gyr 3 way valve MAV-322.