Prima F30 boiler, starts with hair dryer!!!!

[waynedance]

Fan coming on for about 10 seconds but bot firing. It was doing this for about an hour. I got a hair dryer and blew hot air over/near the PCB and the boiler started straight up.

I used the hair dryer as once the boiler is warm its works fine, silly idea i know but it worked.

Been playing up for ages, keeps doing the fan on for 10ish seconds cycle.

Another way to get it to start is to pinch the red pipe that comes from the top of the fan housing. If i blow down the red pipe i can here a click from what I think is the Air Pressure Switch?

Someone on here said the PCB, is this for sure as I have no money to waste.

Thank you.

 

[Gas2Air]

No doubt it's the PCB. Don't blow down the APS tube.

 

[waynedance]

cheers, going to get one from Ebay seen one for about £45 with all postage.

Thank you.

Ps, why did it start with hair dryer?

 

[Gas2Air]

Wet hair relays, very common. You do know that if the PCB is changed you have to do certain critical tests after?

 

[waynedance]

What sort of tests?

thought it was plug and play?

 

[bengasman]

if you have no money to waste, don't buy it from fleebay unless it comes with moneyback guarantee.

 

[Gas2Air]

What sort of tests?

thought it was plug and play?

No. Let's start with positive isolation.

 

[waynedance]

ok you got me.

One on ebay has 1 year warranty.

So will i need someone to fit for me?
What did you mean by positive isolation, turn of power at wall?

 

[Gas2Air]

Positive Isolation. Turn or pull plug out at wall near to boiler, lick finger, touch live. No shock/death then isolated.

Get someone in, seriously.

 

[waynedance]

I Have ordered the part, would an engineer use a supplied part?

Thought I could save some dosh!!

The main power switch is on the wall next to the boiler, or turn power off at main fuse box.

 

[bengasman]

personally, i would not as you would be nagging me if things go wrong.
bear in mind that if you supply the part, any warrantee issues are between you and mr ebay, whoever fits it, is not responsible if it does not work.

 

[waynedance]

Why is it so hard to fit?

What tests would the engineer carry out after fitting?

 

[Gas2Air]

You won't find out here. The tests are mandatory and not for your pinkies to touch.

 

[waynedance]

ok i respect your reply.

Thank you.