Broken Boiler in Minnesota

You may be able to save money by correcting minor problems yourself.

Diagnosing and Fixing a Broken Boiler

• Strange noises: If your boiler knocks or bangs, incorrect installation is a likely culprit. That's a tricky problem and you'll need a professional to correct it.
• Not enough heat: Low water pressure or mineral deposits are most often the cause. First, check the the pressure or combination of temperature gauge. Water pressure less than 12 psi means you need to add water to the tank. Increase the pressure to 12 - 15 psi by opening the water feed valve. Alternatively, mineral deposits in either the boiler or heat exchanger might be the problem. In that case, have a professional flush the tank.
• No heat: First, make sure the pilot light is on. If it isn't, make sure the gas is on, then re-light the pilot light. The manufacturer's instructions should be posted on or near the unit. If your boiler is electric, see if its circuit breaker is tripped or the fuse is blown. If so, replace the fuse or reset the circuit breaker. Then make sure the thermostat is in "heat" mode and is set to the correct temperature. Try adjusting the thermostat slightly and see if the boiler corrects itself. If it doesn't, you may have air build-up in your heating system. Release the excess air by using a radiator key or flat head screwdriver. On top of each radiator, you should find a small valve. Turn it ¼ turn counterclockwise to let excess air escape. Once the valve releases water, turn it back to the original position. Repeat for for every radiator in the house.

Mike Bell is the owner of Extreme Radiant in Carson City, NV. He says that if you wake to a cold house, "The most common cause is a failed igniter or a broken controller. Replacement usually requires a professional service."