General topics about all things heating, ventilation, air conditioning and refrigeration.

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Post by Dxrocaa4 » Fri Apr 06, 2012 5:04 pm

Is there such a thing a residential HVAC (gas heater) unit that does not have anyother fuses other than the Circuit breaker?

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- Fuses

Post by Big » Sat Apr 07, 2012 6:36 am

Why would you want a unprotected low voltage side

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- Fuses

Post by Freon » Sat Apr 07, 2012 4:31 pm

I have an older gas furnace (Trane 1989 vintage) that does not have any fusing for the low voltage control board. Older boards were not as processor/IC oriented long ago. But today most all have a fuse to protect the control board. However what they do not usually have is any protection for induced current spikes from lightning on the thermostat/control wiring.

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