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Old 07-14-2011, 08:03 AM   #16
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No Hot Water when Central Air is On

Apparently not.

I've never lit (or relit) the pilot light in the hot water heater (I didn't even know it has a pilot light!), only the furnace.


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Old 07-14-2011, 07:30 PM   #17
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No Hot Water when Central Air is On

Are you sure the plumbing is done correctly? Maybe you are drawing hot water only from a furnace (or boiler) tankless coil and the stand alone water heater in the crawl space is not sending any water anywhere. THen when the furnace quits, no hot water.
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Last edited by AllanJ; 07-15-2011 at 07:18 PM.
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Old 07-14-2011, 09:20 PM   #18
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No Hot Water when Central Air is On

pictures of everything would help a lot
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Old 07-14-2011, 09:36 PM   #19
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No Hot Water when Central Air is On

I looked up the "furnace" model number, and it's actually a boiler. So if you have a domestic hot water coil in the boiler providing your hot water, that would explain why you get no hot water when the boiler pilot is out.


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