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Worcester Heatslave keeps locking out


 
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Goulders

from United Kingdom

Joined: 12 Mar 2011
Posts: 20
Location: Lancashire,
United Kingdom

PostPosted: Sat Mar 12, 2011 6:25 pm Reply with quote

A friend of mine is trying to sort out a problem with her boiler. It is a Worcester Heatslave 15/19. She recently ran out of fuel and on refilling the oil tank, the boiler kept locking out after around 15 mins. I have had a look and oil is getting to the pump. I have vented the pump to ensure there was no air and all was fine. However, I also found that the CH pressure safety valve was operating and the gauge was at 3 bar. The water wasnt pouring out, but a steady/slow flow was present. I then found that the filling loop had been left open (for several months!!). I have switched the filling loop off and the pressure is now at around 1.25. It doesnt matter whether DHW or CH is individually calling for heat, the boiler still locks out after around 15 mins. Any ideas?
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oilhead

from United Kingdom

Joined: 29 Nov 2009
Posts: 880
Location: Shropshire,
United Kingdom
Thanked: 208 times

PostPosted: Sat Mar 12, 2011 9:35 pm Reply with quote

Try the oil pump solenoid valve
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Goulders

from United Kingdom

Joined: 12 Mar 2011
Posts: 20
Location: Lancashire,
United Kingdom

PostPosted: Sun Mar 13, 2011 7:32 am Reply with quote

oilhead wrote:
Try the oil pump solenoid valve


Is there a way to test it?
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oilhead

from United Kingdom

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Location: Shropshire,
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PostPosted: Sun Mar 13, 2011 10:16 am Reply with quote

Before starting, measure the resistance reading accross the coil. Should be around 2.7K. Run the boiler until it locks out and measure again. If no continuity, coil needs to be replaced. They fail when hot.
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The following user says thank you to oilhead for this useful post:
Goulders (14 Mar 2011)
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Goulders

from United Kingdom

Joined: 12 Mar 2011
Posts: 20
Location: Lancashire,
United Kingdom

PostPosted: Sun Mar 13, 2011 9:49 pm Reply with quote

oilhead wrote:
Before starting, measure the resistance reading accross the coil. Should be around 2.7K. Run the boiler until it locks out and measure again. If no continuity, coil needs to be replaced. They fail when hot.


Cheers for that. Will give it a go.
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Goulders

from United Kingdom

Joined: 12 Mar 2011
Posts: 20
Location: Lancashire,
United Kingdom

PostPosted: Mon Mar 14, 2011 8:44 pm Reply with quote

Spot on. Solenoid has been changed. Works great. Thanx very much.
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oilhead

from United Kingdom

Joined: 29 Nov 2009
Posts: 880
Location: Shropshire,
United Kingdom
Thanked: 208 times

PostPosted: Mon Mar 14, 2011 8:53 pm Reply with quote

Glad it's sorted. Being as you've saved a call out fee, how about a contribution to Red Nose Day?
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