Hi All I have recently moved house and this new house has underfloor heating in the kitchen. now i know the house has been renovated and has been empty for perhaps a year. What i have noticed is that the underfloor heating is luke warm at best. i know it runs from the boiler. i checked under the boiler and noticed the pump was switched off. this ive turned back on but have not really noticed a difference. however i have noticed some adjustable valves under the boiler and wondered if anyone knew what they maybe for?