Why is there no heating but hot water works?
It is a surprising or confusing situation when you are getting hot water, but there is no central heating. You must be aware of the reason behind this issue, which will help to understand the situation when to call a professional, as there are some common reasons why the boiler is working like this.
1. Faulty Thermostat or incorrect settings
One of the most common reasons for working hot water but no heating is a thermostat setting or malfunction. If the thermostat is off or it is not set correctly and set too low issue will make problem to not interacting with the boiler. If there is an issue related to the thermostat or incorrect setting, you need to replace the battery and check for setting also.
2. Issues with Diverter Valve
The diverter valve in combination boilers can be used to route hot water to your radiators or taps. This valve can disregard the central heating circuit and only send hot water to your water fixtures if it gets blocked. The diverter valve might eventually fail due to damage from use, particularly in older boilers. This problem will be solved by a professional engineer.
3. Central Heating Timer or Programmer Issue
The timer or programmer is set to switch on or off your heating system and also controls your heating system. If your heating system is not set properly or it is broken and suffering from electrical problems, then it will not work properly. Verify once more that the air conditioning schedule is working and in action, and attempt to reset the programmer. To solve this issue, you need to call a professional to fix this issue.
4. Low Boiler Pressure
Low boiler pressure is a common reason when centeral heating is not working, but the boiler is giving hot water. Central heating usually fails to operate at a low pressure, but hot water can (the ideal operating pressure level for most boilers is 1 to 1.5 bar). You might need to use the filling loop to repressurise the system if the pressure is too low.
5. Zone or motorised valve malfunctions
Zone or motorised valves regulate the location of heat delivery in systems with different hot water cylinders. Hot water may still be supplied even if heating is stopped if one of these valves fails. Because these parts depend on electrical impulses, even little wiring errors can prevent them from operating as intended.
6. Pump or Airlock Issues
A pump is used by the heater in your home to transfer hot water through your radiators. If pumps are not working due to a damaged or fitting mistake, they will not send water to the boiler and radiators. Heat won’t reach the radiators if the pump is damaged or there is any air trapped in the system. Bleeding the radiators can sometimes solve the problem. You should call a professional expert to see this issue and fix it.
If basic checks, not working like thermostat settings, pressure levels, and timers don’t resolve the issue, you can get connected with Fixhelpia, where we help homeowners to understand common heating and boiler problems and connect them with trusted professionals. If your heating isn’t working but hot water is, expert help is just a step away.