You can carry out many types of gas boiler repair yourself. More complex repairs will require professional help, but some common problems are fairly simple to fix. Learn more about these common problems below.

No Heat

When no heat comes from the boiler, there could be several potential causes. First you should check the circuit breaker (or fuse). If it is in the "Off" position, switch it to "On" and try the furnace again. In the case of a damaged fuse, you will need to replace it.

If the pilot light has gone out, activate it by following the instructions on the boiler. Make sure the thermostat is in "Heat" mode and turn the thermostat up a few degrees to see if the boiler kicks in. Check the water in the boiler. It should be half full and between 12 to 15 PSI. You can adjust it with the pressure-reducing valve. If your unit doesn't have a pressure-reducing valve, open the water-feed valve until the pressure is set at 12 PSI.

Low Heat

If you suddenly find inadequate heat coming from the boiler, the problem will inevitably be low pressure in the boiler. You can read the boiler pressure reading on the tridicator. If the level is under 12 PSI, the boiler needs more water. In most cases, the pressure-reducing valve will rectify this automatically. If you don't have a pressure-reducing valve, follow the directions in the previous section.

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