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I have an old crane sunnyday 15 boiler

Shmevan3 Member Posts: 1
edited February 20 in Gas Heating
I have a really old crane sunnyday 15 booiler  and the poilt light went out and don't know how to light it.  If you have any knowledge on this, please help me.


  • jimna01
    jimna01 Member Posts: 34
    HO not a contractor. The great guys on this forum may be of help. As an HO, 18 years ago I replaced my oil fired Crane SunnyDay oil fired boiler (which was installed in 1960 when the house was built) with a 3-pass cast iron Biasi boiler. I dropped my oil consumption from about 950 gallons per year to 600 galloons per year. I have been laughing all the way to the bank since. You might want to think about replacing this beast this summer.
    EBEBRATT-Ed Member Posts: 15,544
    If you dont know how to light the pilot and there are no instructions on the boiler the chances are you have a bad thermocouple and need a professional to service the equipment
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,852
    I agree with @EBEBRATT-Ed about the probable cause being the thermocouple, however there are different types of thermocouples that have different names. There is the standard thermocouple that generate a 20 to 30 millivolt current that you might find on standing pilot water heaters, they are the most common on older heaters.

    There is another type of pilot flame safety called a pilot generator. They both do about the same thing, but the pilot generator is able to develop 750 Millivolts to power the pilot valve and the main gas valve. So depending on what gas valve you have, you might find it difficult to light the pilot and get it to stay on wit a defective thermocouple type flame safety sensor

    If your gas equipment is really old, you may have BASO system where the pilot gas is always on and not included in the safety shut down circuit. That type system was considered OK over 80 years ago, but it is considered an unsafe design, that is because the pilot gas will keep flowing even if the pilot light is extinguished. That means that there is raw unburned gas constantly flowing if the pilot gets blown out.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?