Sunday, 9 May 2021

Blower speeds for heating and cooling are different

Why does my ECM blower ramp up gradually for heat, but seems to switch on sharply for cooling? The graph below shows the pressure in the plenum first for a heating cycle, and then for a few cooling cycles later in the day.

Name: 05-07-21 furnace both.png Views: 0 Size: 6.5 KB
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source https://hvac-talk.com/vbb/threads/2228844-Blower-speeds-for-heating-and-cooling-are-different?goto=newpost

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