3 port actuator replaced

[Speedy]

Hi
I've just replaced my 3 port actuator. It was pretty straight forward. After I turned the power back on, it blew the 3amp fuse in the circuit board.

What have I done wrong?

 

[Harvest Fields]

Get yourself a gas safe registered engineer. He/She should be able to fix it for you.

 

[Speedy]

I need this working tonight.
I just changed the fuse and double checked the wiring, which all good, but it has blown my last fuse.

Could it be a faulty actuator, even though its brand new.

 

[leesparkykent]

You don't need a gas safe engineer to replace/repair your fault. Can you post a picture of the connections in the wiring centre?

 

[Speedy]

Hopefully the upload worked.
It's a Honeywell circuit board and the Nest 3rd gen thermostat.

 

[oilmark]

Wiring looks very neat
Poss you've just got a stray cable disturbed when wiring new one in?

 

[Speedy]

And this is the brand new actuator.

 

[heliotrope]

I need this working tonight.
I just changed the fuse and double checked the wiring, which all good, but it has blown my last fuse.

Could it be a faulty actuator, even though its brand new.

What was the reason for changing the actuator?

Was it blowing the fuse before changing.

 

[leesparkykent]

Hopefully the upload worked.
It's a Honeywell circuit board and the Nest 3rd gen thermostat.

can you upload a close up pic of the valve connections on the PCB?

 

[Speedy]

When either the central heating or hot water was calling for heat, the boiler would come on, but the pump wasn't, so the boiler just boiled up like a kettle.
I changed the motor in the actuator, but it made no difference, so I bought a new head, but after wiring it in, it keeps blowing the fuse as shown in the picture.

 

[leesparkykent]

When either the central heating or hot water was calling for heat, the boiler would come on, but the pump wasn't, so the boiler just boiled up like a kettle.
I changed the motor in the actuator, but it made no difference, so I bought a new head, but after wiring it in, it keeps blowing the fuse as shown in the picture.

The problem wasn't with the actuator if your pump isn't running. A few minutes with a multi meter will find the problem.

 

[Speedy]

The best I could do.

 

[Old Account]

You may had different colours and connected it wrong ? And I agree with leesparky,

If pump doesn't come on it's an issue with the pump

 

[leesparkykent]

The best I could do.

You have grey connected to the earth terminal marked grn/yel and earth connected to the terminal labelled grey.........

 

[Harvest Fields]

You don't need a gas safe engineer to replace/repair your fault. Can you post a picture of the connections in the wiring centre?

Technically you are correct. A sparky could also. My point was to get somebody that would deal with that sort of thing on a Daily basis as it may be a completely different issue.

 

[leesparkykent]

Technically you are correct. A sparky could also. My point was to get somebody that would deal with that sort of thing on a Daily basis as it may be a completely different issue.

The op has wired the green and yellow in to the terminal marked grey and grey in to the terminal marked green an yellow..This is why it keeps blowing fuses. But as for the OP changing the actuator.....I bet it still doesn't solve the issue of the pump not running.

 

[Speedy]

The op has wired the green and yellow in to the terminal marked grey and grey in to the terminal marked green an yellow..This is why it keeps blowing fuses. But as for the OP changing the actuator...I bet it still doesn't solve the issue of the pump not running.

You are correct on both points.
My problem was not the actuator

 

[leesparkykent]

You are correct on both points.
My problem was not the actuator

Do you have a multi meter/voltage tester that your competent to use?

 

[Speedy]

Do you have a multi meter/voltage tester that your competent to use?

Already done that. And to rule everything else out, I wired the pump direct to a mains socket.
It is definitely the pump.

So now I need a plumber and a new pump.

 

[leesparkykent]

Already done that. And to rule everything else out, I wired the pump direct to a mains socket.
It is definitely the pump.

So now I need a plumber and a new pump.

At least you now know what it is and what you need to do to resolve it 🙂 and also you've stopped the blowing fuse issue.