boiler fuse blowing.Please help me as house is freezing

[tam78]

I have MAIN condensing 18HE boiler installed.3 amp Fuse fitted in the boiler is keep blowing.I have told is that ''only 170ohms between pump line and earth causing fue to blow'' .Has any body got idea what it is?

 

[Taylortwocities]

Who has told you that about 170 ohms?

If there is 170ohm between the line (live) and earth on the pump then the pump is faulty and needs replacing.

You dont say where that fuse is. Is it internal in the boiler, in the supply to the boiler??

 

[ban-all-sheds]

170Ω equates to 1.35A, so that on it's own isn't causing the fuse to operate.

But that low a resistance between L & E is very wrong, so it needs sorting.

Try the Plumbing &CH section - you might get a "Oh yes those pumps often break like that" response, but also get someone to come and have a look.

Whatever you do please don't be tempted to try a bigger fuse...

 

[tam78]

Fuse is fitted internally in the boiler.Installers who put new boiler,new cable from pump to boiler and valve, they came and checked.they advised me that it is the faulty timer.they replaced timer/programmer and room thermostat.After that it worked for 7 days .After 7 days fuse was again blown with pop/bang in the boiler.Installers again came and advised me that there is problem with boiler.today boiler manufacturers came and checked and they told me the problem which i have mentioned in my first thread.

 

[gas4you]

Most onboard fuses on the pcb are rated at approx 2 amp. 3 amp is for the fused spur.

Turn off power to ch and remove the switched live from the wiring center/programmer and make safe.

Insert link between boiler permanent live and switched live. (Only if boiler accepts 240VAC from external controls). This will eliminate everything but the boiler.

See if fuse still blows.