When your thermostat hits the target temperature you’ve set it tells your boiler to switch off. Stat is sending on/off commands when it is supposed too. 1-800-377-8326 ; Get a Quote; Boiler Rental. Submitted: 11 years ago. Category: HVAC. Post by Cicero. Before entering the boiler, boiler feed water temperature should be carefully controlled by a plant manager to ensure optimal conditions for a long boiler life. hi, the gas supply cuts off completely when the boiler comes on in the morning. reached 75 the blower keeps blowing untill the heat exchanger has cooled down the temp. He's replaced the wireing loom and fitted a new fan but the problem still exists. One Corgi registered engineer said the problem was with the pump set at too low a speed, this was increased but the problem has not gone away. Reply. When your furnace shuts off there is still heat in the heat exchanger. The Fix: Firstly, turn off the boiler so you don’t draw any more air into the system. On turning tap off shower goes hot for about 30 seconds then boiler cuts out for a few seconds then fires back up. This would cause the furnace to shut off before it actually warms the house enough. G Brown, … This happens most often when it is cold – less than 30 degrees. Maybe there is a display that tells you the current temp too.) The boiler has been regularly serviced and maintained. The boiler will cut out when the water in the pipes reaches a set temperature too, not just when room-stat says so. Share this conversation . A 14 day cooling off period applies to all applications. When the water temperature in the boiler becomes too high, it increases the water pressure throughout the system. i will monitor and get back to you. Boiler Rental. in your house would proably be 78 to 80 degrees. kevin eastwood on 12th December 2016 at 1:07 pm Hi there, I have a ideal isar he30, just replaced the trap after being blocked up with sludge, my new problem is the boiler seems to be ignoring the thermostat. A Broken Sensor. Refocus on main menu Refocus on main menu Boilers Combi Boilers ... Finance options are offered subject to status and credit check which must be completed before commencement of works. We arrowed up to 21 C and the furnace came on for about 25 minutes, heated to 20 C and then turned off. This causes a safety cut out switch to activate, killing the flame. If cancelled within 14 days, alternative payment of full outstanding balance must be made. Call your engineer out to take a look at your boiler pressure release valves or vents, as they could be the culprits, if they aren’t doing their job correctly. Previously, our thermostat was keeping your boiler on until your home reached the right temperature. Boiler on/off switch. Even when it does work the boiler cuts out well before the temperature has reached the room thermostat temperature. If you notice that your boiler’s temperature is going higher than the above settings, you have a major problem. When the thermostat is not performing its duty, this, in turn, keeps the furnace from performing its duty. It does not take the heat exchanger long to reheat this small amount of water back to the thermostat’s temperature setting which is why the boiler quickly turns off again. Most modern boilers will have a digital dial that allows you to set the output temperature. I posted a perfectly helpful link for the OP and they delete it! It might be from 60-80C. G Brown New Member. (What is the CH boiler temperature set to? Plumber: Andrew Smith, Engineer replied 3 years ago. Post by raden . Buttons I switch off dial that allows you to set the output temperature the. A buttons about 15 minutes later it came on for about 25 minutes heated! 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