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It is common to experience issues with your boiler, and it can be very frustrating when you have no hot water but the heating is still working. If you're in this situation, you may be wondering what's wrong and how to fix it. Fortunately, there are a few steps you can take to troubleshoot and diagnose the issue. In this guide, we'll discuss the most common causes of no hot water but heating working and how to fix them.

The first step is to check the thermostat settings. If the thermostat is set too low, it won't be able to heat the water to the desired temperature. To adjust the thermostat, turn the knob or dial to the desired temperature. If the thermostat is set correctly, the next step is to check the pressure gauge. The pressure gauge should be between 1 and 1.5 bar. If the pressure is too low, you'll need to top up the system with water. To do this, locate the filling loop and connect it to a mains water supply. Once the pressure is back to normal, check the temperature of the water. If it's still not hot enough, you may need to adjust the temperature control valve.

If the pressure gauge is within the normal range and the temperature of the water is still too low, the problem may be with the boiler itself. If the boiler is not working, you'll need to call a qualified engineer to diagnose and repair the issue. Common boiler problems include a faulty thermostat, a broken diaphragm, or a blocked heat exchanger. The engineer will be able to identify the problem and repair it.

If the boiler is working but the water isn't hot enough, the problem may be with the water heater. If the water heater isn't working, you'll need to replace it. Common water heater problems include a faulty thermostat, a broken heating element, or a blocked filter. If the water heater is working but the water isn't hot enough, you may need to adjust the temperature control valve. This is usually located on the side of the water heater.

If you're still having issues with no hot water but the heating is working, you may need to check the radiators. If the radiators are cold, you may need to bleed them. To do this, use a radiator key to open the bleed valve and let the air out. Once the air is out, close the valve and check the radiators again. If the radiators are still cold, you may need to call a qualified engineer to diagnose and repair the issue.

In conclusion, if you're experiencing no hot water but the heating is working, there are a few steps you can take to troubleshoot and diagnose the issue. First, check the thermostat settings and the pressure gauge. If the pressure is too low, top up the system with water. If the pressure is within the normal range and the temperature of the water is still too low, the problem may be with the boiler. If the boiler is working but the water isn't hot enough, the problem may be with the water heater or the radiators. If you're still having issues, you may need to call a qualified engineer to diagnose and repair the issue.