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stephanie1963
Aug 17, 2007, 09:52 AM
We set our thermostat on 70 and by 12 noon it reads 80 degrees. The air that comes out of the vents is very low pressure, like there is a blockage. The maintenance crew has worked on it several times, but no improvement. The air stays on all day and night and only starts to shut off and on at around 4 am. It also freezes up a lot, outside and inside. What could the problems be?

hvac1000
Aug 17, 2007, 10:02 AM
Dirty air filter.
Dirty inside coil
Dirty outside coil.
Low refrigerant charge
High refrigerant charge
Maintenance men usually are not professional HVAC people but more of a jack of all trades. This could also be part of the problem.