| My
Heat Pump Blows Cold Air There are actually
two parts to this problem.
1. The heat pump really is blowing cold air.
2. The customer thinks it is blowing
cold air.
The second part is the easiest
to answer because it usually only happens to new
heat pump owners. The explanation is really quite
simple.
Air temperature from heat pumps are much
lower than the temperatures from fossil fuel (gas
or oil) fired systems. Air temperatures of fossil
fuel fired systems range from 130-140 degrees
whereas heat pump air temperatures range from
85-92 degrees.
Because your body temperature is 98.6 degrees,
obviously 85 degrees would feel cold. However,
85-92 degree air is much warmer than the temperature
you are trying to maintain within your home.
To verify the above, try measuring the air temperature
at a supply and return register. If there is no
difference between the two, then there is a problem.
If the heat pump really is blowing cold
air.not putting out any warm air at all there
could be several things wrong.
Below is a list of possible causes. Items in
blue can be addressed/fixed
by homeowner. Items in red
usually require a service call.
- Snow drift/leaves against
outdoor unit.
- Outdoor unit iced up-weather
related.
- Return duct leakage.
- Cold return temperatures
I.e., air handler in attic/crawl space
disconnected from unit,
pulling in cold air.
- Thermostat set below
65 degrees.
- Low refrigerant charge
- Refrigerant flow related
problem
- Restriction/defective
metering device.
- Poor efficiency-needs
cleaning & servicing.
- Defective reversing
valve.
- Defective compressor
valves.
- Compressor not running
- Running in A/C mode.
- Outdoor unit iced up
because of a malfunction.
Hope this has been of some assistance, however
they are just rough guidelines and not all-possible
conditions are covered.
Remember: The
company You Choose To Install and Service
Your System Will Determine The Degree of Comfort
and Satisfaction You Enjoy.
Excerpts of the preceding information has been
compiled by Hannabery
HVAC, which has graciously permitted us to
include them on this web site as a service for
all homeowners.
These
"Common HVAC Problems" are provided FREE and as
a consequence Climatemakers does not assume any
liability resulting from any information we provide.
In all cases where there is any possibility of
injury, consequential damage, direct damage to
your equipment or when recommended by the equipment
manufacturer, your system should be repaired ,
inspected or maintained by a qualified technician.
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