What to do about poor air flow in upstairs vents?
In that scenario, there may be a high enough volume of air to provide reasonable flow at the lower levels of the home, but not the upper floor. The good news is that the solution should be an easy adjustment — to boost the blower speed, by a licensed HVAC technician.
What happens if I set the blower on high?
Acceleration does not affect it. If I set the blower on “high” or “Max AC” it will only blow out of the defrost vents. I suppose it could still be a vacuum leak.
Why does my AC blower blow out the vents?
If it does, it’s almost certainly due to a vacuum leak. Acceleration does not affect it. If I set the blower on “high” or “Max AC” it will only blow out of the defrost vents.
Where to look for poor airflow in a home?
There should only be two places to look when investigating poor airflow from a forced air heating system. The furnace itself may seem like the obvious culprit, but it is rare for an upgraded furnace to worsen the heat distribution in a home, rather than improve it.
How does a fan proving switch work on a blower?
As a fan proving switch, the low side would be piped into the inlet side of the blower wheel and the high side would be piped into the outlet side of the same blower wheel. Then you would calibrate the AFS to make contact when there is a difference in pressure greater than one inch (1 in.) of static pressure (in. wc).
If it does, it’s almost certainly due to a vacuum leak. Acceleration does not affect it. If I set the blower on “high” or “Max AC” it will only blow out of the defrost vents.
Why is there no air flow in the upstairs vents?
I have recently seen several newer furnaces installed that appear to be set on a very low speed when the heat or air conditioning is on, when it should be at maximum. In that scenario, there may be a high enough volume of air to provide reasonable flow at the lower levels of the home, but not the upper floor.
Acceleration does not affect it. If I set the blower on “high” or “Max AC” it will only blow out of the defrost vents. I suppose it could still be a vacuum leak.