a 2 speed furnace has a 2 stage gas valve which doesnt do anything for
a regular single speed condensor, for the AC the blower is set to high
as default with a 2 stage furnace. ACs are set up for maximum cooling,
Jim is just trollin for fun. You would risk freeze up of the coil if
you tried to set up a 2 stage blower on a single stage condensor, I
dont think any tech would do it.
Sometimes the two speed fan is used at a slow speed for heat and a higher
speed for the AC.
Still not 'overdrive'. They are just more efficient that way.
Some newer systems have a fan that has several speeds and ramp up slow when
they come on. Has to do with getting the most SEER rating for the system.
The OP obviously didn't know much, and your choice of words therefore
was VERY POOR. You should have said that it would be turned on for a
long period of time and that the evaporator coil could freeze solid
and block the air flow. Ransley was right, altho his choice of words
was over the top, as he frequently does.
Turn it off immediately. It is NOT good to have the condenser on
without the air handler. The air handler (indoor blower fan) is either
not on which means someone screwed-up the installation or it is on but
for some reason the air is not circulating such as a blocked
evaporator. In either case turn it off before the compressor is
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