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Old 04-16-2019, 01:46 PM   #1
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HVAC Hi/Low Fan Switch

Not sure if the thermostat in my 2004 Dolphin is the original one or not, but it has both a high and a low fan setting. However, the fan seems to run on high in either position of the switch. Is this normally a two-speed fan?
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Old 04-16-2019, 02:44 PM   #2
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Two speed, but not a lot of difference. I can hear a slight change but seems insignificant.
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Old 04-17-2019, 12:12 PM   #3
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First, if the room temp is > 6 deg below the temp dialed into the thermostat (ex: room temp is 60 and you want it to be 68), the HVAC tries to start the gas furnace to make up the difference. If the difference is 5 deg or less, the heat pump comes into play.
If my memory serves me, the blower will not run continuously (ON rather than Auto) when in heat mode. I may be wrong but I remember being frustrated that I couldn't get the "fan" to stay on continuously when in heat mode.


The "mystery" switch in the bay with the transfer switch sets the HVAC to either 50 amp (up) or 30 Amp (down) mode.
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Old 04-17-2019, 05:44 PM   #4
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Quote:
Originally Posted by JJH3rd View Post
First, if the room temp is > 6 deg below the temp dialed into the thermostat (ex: room temp is 60 and you want it to be 68), the HVAC tries to start the gas furnace to make up the difference. If the difference is 5 deg or less, the heat pump comes into play.
If my memory serves me, the blower will not run continuously (ON rather than Auto) when in heat mode. I may be wrong but I remember being frustrated that I couldn't get the "fan" to stay on continuously when in heat mode.


The "mystery" switch in the bay with the transfer switch sets the HVAC to either 50 amp (up) or 30 Amp (down) mode.
Yep, the salesman told me that the a/c only used one compressor when running on the generator, but that was only because he had the switch in the 30A position. Basement a/c works great since I changed switch position to 50A.
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