Idiot Gas Furnace Questions


Old 05-07-14, 12:32 PM
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Idiot Gas Furnace Questions

How is it my gas furnace can have wires right in the cabinet close to the burners? How come the wiring doesn't burn or char?

Also there are power wires touching gas piping? How is that safe?

What type of safeties are built into these 90 percent furnaces?

Maybe a silly question, but I never owned a furnace before this one... moved from California to Midwest!
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Old 05-07-14, 12:54 PM
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As long as it is drafting the flames into the furnace correctly, there is no chance of the wires being damaged. Flame roll out safeties on modern furnaces should shut it down before there is a chance of wire damage.
Old 05-09-14, 09:10 PM
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A fan pulls the exhaust through the heat exchanger, so wires can't get charred unless there's a problem. Safeties would shut the furnace down long before a hazardous condition develops.

Safeties in a condensing furnace:

- High limit switch prevents overheating
- Rollout switches, as tinmantu alluded to
- Sealed combustion
- Pressure switches which prevent the furnace firing if there isn't a proper draft.

Gas furnaces if properly installed and maintained are incredibly safe.
Old 05-09-14, 09:15 PM
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Gas furnaces if properly installed and maintained are incredibly safe.
Well put.... and with the emphasis on maintenance.

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