Heatline combi boiler problem

[duncancallum]

Right the thermal overload indicator is on on my boiler, and I have lost heating and hot water.

Its a Heatline star 24 combi. As it was in when we bought the house I have no manuals for it.

Any sugestiosn to reset. I think its tripped in due to the filling loop bleeding xs pressure into the ch system.

Cheers

Duncan

[dirkgently]

I would imagine that the system has been over-pressurized and has released water through the pressure release valve, the boiler then ran empty and tripped the over heat thermostat.

The water pressure will have to be taken up to one bar and the overheat thermostat reset. I think the overheat reset is on the right under a black cover, (but I could be wrong).

[cjs]

How much pressure is now in the system? There should be a gauge somewhere.

There should also be a pressure relief valve to stop too much system pressure, this will vent to an outside pipe. It is very likely you will need to remove the casing to gain access to the valve, you can then vent the pressure to the correct 1 Bar required.

I would also disconnect the filling loop if the valve is faulty.

[duncancallum]

The boilers at the correct pressure, however the warning led is still lit.

I have had the covers off the front, the drop down panned with the controls on it and the main steel front cover. I cant see anything that resembles a reset trip.

I am looking for something resembling a inertia electric fuel cut of swith?

[Ferg]

duncancallum said:

The boilers at the correct pressure, however the warning led is still lit.

I have had the covers off the front, the drop down panned with the controls on it and the main steel front cover. I cant see anything that resembles a reset trip.

I am looking for something resembling a inertia electric fuel cut of swith?

If it isn't an electronic device on the board (in which case it should reset with turning it off at the wall) it will be a small button which is attached to a thin (2mm?) copper capillary tube attached to the flow pipe of the heat exchanger somewhere.

[duncancallum]

I will go and look Ferg Cheers!

[duncancallum]

I couldn't see the capilary tube Ferg mentioned so I took some pics.

[Ferg]

You need to boost the pressure up and press that reset button. Do you know where the filling loop is?

[duncancallum]

yeah when it was at 1.5 bar the reset didnt do anything, I presumed there was a solind inside the unit.

Ill try it again tomorrow

[dirkgently]

Looks like you have a leak on the heat exchanger, just to add to your woes.

[duncancallum]

Aye, that cheered me up no end when I pulled the cover off. I cant see any dampness around it though. Im gonna have a proper look this evening.

[Globulator]

BTW that pump in the bottom right-hand corner. Does it work?

[duncancallum]

I cant hear it kick in you can hear a tick as the taps turned on. which should then ignite the burner.

The pump should only be for C/H though which if the boilers tripped out it won't turn on?

[duncancallum]

I've found the thermal trip on onward on the pipes
its got some white gunk under it. Its reset and now the fan and pump kick in but it still doesn't ignite. The leak is the union to the heat exchanger.

[duncancallum]

I've found the thermal trip on onward on the pipes
its got some white gunk under it. Its reset and now the fan and pump kick in but it still doesn't ignite. The leak is the union to the heat exchanger.

[Ferg]

duncancallum said:

I've found the thermal trip on onward on the pipes
its got some white gunk under it. Its reset and now the fan and pump kick in but it still doesn't ignite. The leak is the union to the heat exchanger.

It may not fire with the case off. The air switch may not prove.

[duncancallum]

Cheers people its alive next job that heat exchanger

[Ferg]

There are neoprene 'o'-rings in there. Not difficult, once you've drained the boiler, but a bit awkward to drop the pipe out of the socket.

Well done on the repair!