Boiler Working But No Hot Water

If your boiler is working but you have no hot water, there is a long list of items you can check to identify the problem and resolve it. You might find out that it is something you forgot to turn on. Because of this, it is best you do a quick preliminary check before involving any experts.

Flow rate

In cold weather, the flow rate of the water can deep. You might think your boiler is not working but the problem is actually the low flow of water over the heat exchangers. To know if this is the problem, you can run the hot water tap but only at a trickle. If the problem is the flow, it does not require immediate repairs. You might have to wait until the weather warms up a bit.

Check the boiler

If the water flow passes, you need to check the boiler. First, make sure that power is getting to the boiler and that it is working. Check the lights at the panel. Check the timer and other components and make sure they are working properly. Also, look at the pressure gauge to make sure nothing is wrong. If the pressure is fine, it should be at 1 bar.

See Also: Boiler Pressure Keeps Dropping to 0

You can also try to feel the pump. But, we strongly advise against taking the boiler cover off to check on the pump. This should only be done by qualified engineers who are trained and registered by Gas Safe.

Check the timer

Your boiler might stop working because the timer is wrong. Time could move forward or backwards and if there was a power cut, it could have reset the timer. Check the timer to make sure it is set up correctly. If it is not, you can adjust it and see if that fixes the problem.

Check thermostat and pilot light

If the thermostat is turned down or off, it can explain why you have cold water coming out of the taps. You might have forgotten to turn it back up when you came back home. Next, check the pilot light which should have a crisp blue colour. Once you have ascertained that these are working well, you can move to the next step.

Turn everything all the way up

Try to kick the water heater into action by turning up the radiator and the water temperature. If this does not work, check the expansion tank and the feed. If you have an open-ended tank, you can check the ball valve float to make sure it is not stuck.

Finally, if everything else fails, try switching the system off and on again to see if it is going to pick up. You need to give it a couple of minutes. This should reset the appliances and if there was something that was not working properly it should be able to work now.

Call in the experts

If all the checks don’t work, you can get in touch with us. We will send a qualified member of our team and a Gas Safe registered engineer to look at the system and get the hot water flowing again.

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