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Haydn low coolant alarm is on all the time
Posted: Fri Jun 06, 2014 12:04 pm
by langtoftnick
The muppet who had my bongo before me had shorted out the sensor wires on the low coolant alarm... Thanks! When I repaired it the alarm is now on all the time. I suspect some additive, radweld maybe, has coated the sensor screws in the header tank.
Anyone had this happen? Can they just be cleaned, or do they need replacing? If so does anyone know if they are ordinary screws or something special?
Thanks everyone.
Nick
Re: Haydn low coolant alarm is on all the time
Posted: Fri Jun 06, 2014 12:21 pm
by Simon Jones
You can remove the screw & give it a gentle clean with a wire brush. As long as you loosen the cap first (when cold) there will be no pressure in the system so you should not really loose any coolant during this process. The screws are stainless steel in the unlikely event that replacement is required.
Re: Haydn low coolant alarm is on all the time
Posted: Fri Jun 06, 2014 8:59 pm
by haydn callow
Yep, just do it when cold.....release the tank cap then seal it again....remove the screw and wire brush it....or contact me for a new screw.......they are A4 stainless but the length and thread are critical.
Re: Haydn low coolant alarm is on all the time
Posted: Fri Jun 06, 2014 9:57 pm
by langtoftnick
I had a reply of enginesaver in Australia, they say the screws are 25mm now, mine are shorter than this - they started using longer ones a couple of years ago.
Re: Haydn low coolant alarm is on all the time
Posted: Fri Jun 06, 2014 10:01 pm
by haydn callow
langtoftnick wrote:I had a reply of enginesaver in Australia, they say the screws are 25mm now, mine are shorter than this - they started using longer ones a couple of years ago.
Length is not critical, but we can send a new one....however ..first I would clean the screw you have and see if it improves.....there are other causes of the alarm sounding and my guess is that it is wired wrong,
Re: Haydn low coolant alarm is on all the time
Posted: Mon Jun 09, 2014 12:44 pm
by langtoftnick
Cleaning seemed to do the trick, now have to siphon some water out to check it does actually go off!
Re: Haydn low coolant alarm is on all the time
Posted: Mon Jun 09, 2014 1:01 pm
by haydn callow
It will....but if you just unplug the bullet connector on the sensor wir e near the alarm unit ...that will test it....