Boiler Repair

hands opening a wall-mounted water heater

Boilers are used to provide heat and hot water in a home but from time to time, boiler repair becomes necessary. Like everything else, a boiler can develop problems, but a number of boiler repairs can be conducted without calling in a plumber. This ultimately saves you money, but if you only have a little confidence in your ability or no plumbing experience, it can be safer and more reassuring to phone a plumber.

No Heat

If the boiler is producing no heat, check the circuit breaker or fuse box for any signs of problems. If the breaker is off, switch it back into an active position. If the fuse has blown, you will need to replace it. You will also need to check the water level of the boiler. If the level is low, open the manual feed valve and let water into the tank until the pressure reaches 12 PSI.

This should start up the boiler again. If not, you will need to consult a professional, as the problem is likely more serious.

Noisy Pipes

Over time, it’s possible that you’ll find that your pipes make more noises than before. This is often due to water retention in the return pipe. The pipe should be pitched at an angle to allow water back into the boiler and if the angle isn’t right, water will simply remain in the pipe. To undertake this boiler repair, you’ll need to increase the angle of the pitch slightly. To do this, you’ll need to use a piece of metal, or a pipe stand to increase the angle. This should eliminate the problem of noisy pipes in your boiler.

Low Water Level

If the water level in your boiler is regularly lower than it should be, you probably have a leak in the system. To check if this is the problem, look for water around the return line or in the boiler. If signs of leaking are obvious, the best way to proceed with this particular boiler repair is to call in a plumber to replace the pipe. If there’s no obvious sign of a leak, it will probably still be advisable to call in a professional.

Not Enough Heat

Where’s there’s not enough heat coming through the radiators, your boiler probably needs to be flushed. This boiler repair is easy. Start by shutting off the power to the boiler and the automatic feed. Attach hoses to the return drain and the boiler drain, before opening them both. Allow the accumulated water to flow into a bucket or a drain. After all the water has drained, close the drain valves, refill the boiler and drain again, repeating the process until the water flows clear.


You can avoid a lot of boiler repairs by regularly maintaining your boiler. This is easily accomplished. First, you have to verify the reading on the water gauge against the water that is actually in the boiler.

Next, test the relief valve. While the boiler is running, raise the valve. Steam should be discharged for a short while before stopping. If steam discharge continues, you’ll need to replace the valve.

Finally, you will need to open the low water cut-off. Place a bucket below the boiler, as opening the low water cut-off will flush out the sediment in the system. Be aware that the water will be hot. Run until the water becomes clear.