Signs your condensate pipe has frozen include your boiler shutting down and making gurgling noises. Please feel free to give us a call on 0117 924 7200 and we’ll be happy to assist you. Time Switches provide simple time control which are most suitable for combi boiler systems. television by switching off the power for 5 minutes ,switching back on, allowing the computer to reset Low water pressure can cause your boiler to turn itself off. Over time, diverter valves can become degraded and faulty or can be stuck in the wrong position, cutting off your hot water supply. Some banging noises could potentially be an indication that the pump – which pumps hot water from the boiler around the central heating system – is close to failing. What's the difference between a Boiler and Water Heater? The water then flows through the system, heating the zone, until the respective thermostat’s temperature setting is reached. They may need to be cleaned or replaced. Pre-heating. Some zone valves include auxiliary limit switches to determine if the valve is completely open or closed. is asking for heat but the boiler does not respond. The radiators only get hot again when I run off the hot water in the bath for 10 mins or so. If there is air in your central heating system, then your boiler may shut down. By shutting off the water intake valve, you are making sure that no water enters the system while you’re hard at work draining it. Thank you. Programmers & Time Switches. Hi, our combi comes on fine and heats up to 60C but then cuts out until the temp drop to about 55C, comes back on, rinse and repeat every 2 or 3 minutes which is annoying and inefficient I suspect.. All well before the rooms are to temperature. After prolonged use, a range of faults can develop in these valves, which prevent them from changing position; therefore, either your central heating or your hot water will stop working. You can check if you’re in a hard water area here. Any ideas? Having to turn on the central heating in order to get hot water from hot taps. But back to original question, if a zone valve stops a room heating which has a eTRV head in it connected to a central thermostat it will stop the boiler switching off. We have the experience and knowledge to advise you on all aspects of your heating and plumbing requirements. Could be the thermostat on the hot water cylinder has failed or is wired wrong, or it could be the valve for the heating has failed. This is normally located in a loft or a high place and is only used on an open heating system. E&OE. After the gas supply has been turned on everything is fine. Hi can anyone help,my boiler ignites fun not water for couple of mins boiler goes offsite on off couple of times and it sometime s stays on,when it does the dial on pressure gauge moving backwards and forwards rapidly. However, we are finding that the central heating is coming on during the night and presumably during the day when we are out! This has happened on a few occasions as well as it changing from constant to off, auto to off, and all other variations. You might hear your boiler fire up from time to time, even when the heating is off and you’re not drawing any hot water. My Baxi is playing up. We have just installed a new thermostat. I have recently had the ball cock replaced in the f&e tank but the same symptons remain. Here’s why. It is called short cycling and is likely to make your heating bills more expensive and, in the long term, will cause damage to the boiler. Generally, boiler pressure should be between 1 and 2 bar. If/when the heat exchanger breaks and needs replacing, it typically costs between £300 – £500 (depending on the boiler model) excluding the Gas Safe engineer’s labour costs. Increasing the size of your fuel feed pipes and having them serviced can solve any issues with your boiler switching itself off and improve the amount of heat and hot water your home receives. Faulty Pump. Its nearly 5 years old. Only way it could get it to shut down was knock the mains supply to controller off. For more information, or to book your servicing with one of our Gas Safe registered engineers, get in touch. The water tank has two jobs; Feeding water to the central heating system when water is low. It seems only the CH gets stuck on. A drop in water pressure can be caused in a number of ways, including a leak in your system or simply bleeding your radiators. Thank you in advance. Either the room thermostat or the water cylinder thermostat calls for heat when the boiler turns on. Established for over 40 years, DHS is one of the largest central heating installation businesses operating in the South West. If lowering the pressure doesn’t make any difference try bleeding the radiators of excess air and water before calling a Gas Safe engineer. 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