Laars Endurance boiler faulty thermostatic blender controller

Hi Folks,

I have purchased the Laars Endurance boiler five years ago. I have not faced any major issue during these years but unfortunately, today I realized that when the boiler runs hot water, it remains much hot for few minutes and after that, it cools down suddenly. What is wrong with it? Should I replace the boiler?

Thanks in Advance


Hi Edward,

The reason behind your problem is faulty thermostatic blender controller. The only solution is to buy and fix a new thermostatic controller. Another reason could be the water scale. You can easily restore the required hot water when the boiler has heat exchanger. This process is not difficult but it is time-consuming as it consists of getting hoses and chemicals in the home. Therefore, you have to seek help from the Laars boiler engineer.