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Samyu

Hello,

 

I hope some one can put light on this.

 

Glowworm ultimate 40ff heat only boiler on Y plan.

 

When call for heat boiler fire ups. Zone valve working. 

 

Thermostat working.

 

But there is no power to the pump.

 

Boiler will cut off after few minutes, because of no circulation.

 

Check all the wiring, they all okay.

 

 

If you have any suggestions. 

 

Thanks

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Doc Hudson
6 minutes ago, Samyu said:

But there is no power to the pump.

 

Check all the wiring, they all okay.

 

 

Welcome to the forum, I would suggest the two statements above contradict each other. Either you haven't checked the wiring correctly, or there is power to the pump but the pump has failed. Are you DIY or electrically competent? What test equipment did you use during your checks and investigations? I would be going back and double checking the whole circuit again and/or putting a separate power supply directly onto the pump to see if it is still working.

 

Doc H. 

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Sharpend

Is this a new boiler or has it been working prior? 

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kerching

If I remember correctly the ORANGE wire fires the boiler and pump

I would guess that the joint is duff or there is a break in the pump wire OR the pump is Goved

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Samyu

This is old system, working prior.

 

 

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Samyu

It's doing same thing on dhw and heating demand. Boiler fire ups, zone valve move. Stays on for few minutes. It will cut off as there is no cirrullation from pump.

 

Pumps getting no power at all. No power at wiring box.

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Murdoch
40 minutes ago, Samyu said:

This is old system, working prior.

 

 

 

Yours or a customers?

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Samyu

Customer

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Geoff1946

I believe the pump should be wired either straight across the boiler supply terminals or have a live feed from the boiler control board itself if it has an over-run function.

(i.e. The pump must run whenever the boiler fires, and possibly run on to cool it after switch off. )

Hence its either a wiring fault or a boiler fault. Nothing else in the control circuit should be involved.

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Samyu

Possibly PCB faulty

 

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kerching
1 hour ago, Samyu said:

Pumps getting no power at all. No power at wiring bo

What are you defining as "wiring box"?

as I and others have said.....pump on boiler on as it is controlled by the orange wire

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Samyu

Wiring junction box. Not the PCB wiring.

 

 

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