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Posted by HeatPro on July 19, 2006 at 12:24:32:
In Reply to: Spring (summer) boiler maintenance posted by mike on July 19, 2006 at 11:50:19:
You might find the first problems in 25 years in the system this fall. Turning off the pilot light gives an opportunity for small spiders to make a home in the pilot hole where the gas comes out. The flame off can often make it difficult to relight a weak pilot thermocouple, so that might have to be replaced along with the pilot. The water inside the system is worth GOLD. It has no oxygen in it and all the hardness settled on the inside long ago. When you put fresh water in, 5% of it buy volume is air, so 1% is OXYGEN to corrode the metal inside. If fresh and new was better thay would have designed systems not to be sealed, but to leak and they would have made standing pilots to be shut off as often as possible.
The most common gas heat problems each year requiring service are the electronic ignitions to be able to turn off pilot gas:
http://www.heatpro.us/service/ignitor.htm