biasi wont light up!

[mas13]

THe boiler is a biasi 24s.

Yesterday it was working intermitently. The heating would be on for about an hour and then it would go off. Checked the boiler and had to reset the red lockout switch. Fan seemed to be a little noisier than usual. It did that for a few more times.

Today it wont light at all on hot water or heating. I have taken the cover off and can see the microswitches moving on the diverter valve. I know some of you may shout but i also removed the inner cover. The fan turns for a few secs (as if trying to get to speed) and then stops. A few secs after it locksout. Is there a way of testing if the fan /fan coil is broken and could it be anything else that would cause the fan to stop turning

Thanks

 

[gas4you]

Fit a new fan.

 

[mas13]

Thanks Dave.

Would there be anything else that would stop the fan from spinning other than it being faulty.

Could someone tell me how to test the fan as i have a multimeter handy

 

[gas4you]

You could test it all you like, but probably muck got in the bearings and jammed it.

As long as you've got 240V at the terminals and it won't spin change it.

 

[mas13]

it spins for a 10 secs or so then stops. Is that due to faulty bearings??

 

[gas4you]

Could still be, they may be jamming slightly so the motor hasn't enough force to turn it.

The machine tolerances on the fan are very small.

 

[mas13]

Could i test this fan with a flying lead just to make sure its broken.

Eg, a 5amp plug with lead and crocodile clips. Isolate and disconnect current fan terminals and attach the croc clips, then see if it runs freely for a min??

 

[bengasman]

Test for 230 like Dave said. NOT when it spins, as it obviously has power, but when it stops

 

[mas13]

Test for 230 like Dave said. NOT when it spins, as it obviously has power, but when it stops

If i do this and find no voltage what would this mean

Thanks

 

[bengasman]

Test for 230 like Dave said. NOT when it spins, as it obviously has power, but when it stops

If i do this and find no voltage what would this mean

Thanks

that the fan is probably okay

 

[wms]

test for resistance across l and N at fan power off of course should be approx range of 140 to 160 ohms if this ok and you got 240v when power on if still not working points to build up of muck but please note to change a fan you should be corgi registed as this effects the flueing of your boiler .a little knowlage can be dangerous.

 

[Agile]

You test the fan with a.... wait for it..... A FINGER !!!

See if it spins freely!

If it really does then measure the applied voltage and see if that stops before the fan stops.

If it really is a free fan and the voltage stops after a few seconds than it might be a faulty ignition circuit, buts thats pretty rare!

Tony