Hi Guys and girls, I have a Heatslave 15/19 oil boiler, Of late the over heat button keeps poping out, it seems ok with just the heating on but when i have a shower it pops out, any ideas please !!!
Make sure the heatstore does not have an air pocket in the top.
Is the auto air vent working?
Do you have a good system pressure?
Does it drop quickly?
If the system pressure is low, the pump does not circulate enough and the boiler overheats. If there is air in the heatstore, then the water does notreach the thermostat pocket and the boiler overheats.
If you have installed the diverter valve back to front then it would give you this symptom, but also you would have permanently hot radiators and no hot water. What diverter is fitted?
the constant bleeding is a concern. Have you bled the pump and the heatstore? If the air vent is stuck, then loosen it on the threads to bleed it. Also, is the expansion vessel failed? If it is full of water, then stands a chance it is k"""""""d. Depress the Schrader valve and if water comes out, replace the vessel.
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