Heat pump blows heat half the time and cold half the time
The heat pump heat works normal....until....it will kick on and blow cold air sometimes. This causes a quick temp drop in my 450 SF bonus room area (71 degrees down to 68 in only 2 minutes for example).
I turn it off and sometimes when i turn it on again it works normal and sometimes it doesn't....
Amana heat pump http://www.dnmech.com/lit/20209826.pdf
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the unit works by chilling air and the byproduct is heat in the compressor, this is used for heating in the winter and then reversed in summer to blow cold air. It has to blow cold and warm up before it can blow heat.
Heat pumps defrost which is the AC mode, if the heat strip isnt working during a defrost, the air will be cold, A heat pump only feels warm if the heat strips are on too! the refrigeration cycles heat output is much less sensible to our 98F skin. heat pumps that satisfy a room setpoint are working at least, all heat pumps feel drafty to most.
Find a reputable HVAC contractor to do a
room by room analysis with heat and cooling loads calculated and units
sized and duct requirements and compare to what you have.
The air not being cold is not necessarily an indicator of anything
malfunctioning. High efficiency units for instance don't produce cold
Since you have had someone look at it, the duct
work may be collapsed which restricts air flow or uninsulated which
warms up the supply air. Either one is a possibility. Any Cox Cable guys
been stompin' around your attic lately? Wouldn't be the first time.
Usually, when the air coming out of the vents is not cold enuf it's because your freon level is low. Probably leaking, but they can usually recharge the freon and it will work for a while. Try another repair company and see if they can recheck the freon level.
We have a high efficiency unit and it produces cold air, so I don't know what previous poster is referring to. Air conditioners are supposed to blow cold air.
Sorry, to tell ya but it is normal if the outdoor temperatures are much
below 45 degrees. Below 45 degrees there is little heat outdoors for the
heat pump to grab to heat the home so it will run 24/7 and blow cool or
cold air. Below 45 the temp of the air coming out the vent will decline
and you will get no heat from the heat pump itself as you near
Your emergency heat or auxiliary heat is electric strip heat. But it
only kicks in during normal operation if the temp in the house drops 3
degrees below the setting. (some tstats if can be 5 deg.) Otherwise the
heat pump will blow cool or cold air the rest of the time if it is too
To prevent it from running all the time and blowing cold it is
recommended if the temp outside is falling below 45 degrees you should
just switch to the emergency heat setting, which shuts the pump outdoors
off, and just heat with the electric.
But if there is no heat outside the heat pumps will blow cold. They are
the cheapest and most efficient forms of heat but only as long as the
outdoor temp is above that 45 deg..
I'm guessing that if you haven't experienced this you live in some place
with moderate winter temperatures like in Northern Florida and rarely
get very cold winter temps like the freezing you have seen there
It will likely blow much warmer when the outdoor temp rises.
Heat pumps provide good heat until the tempurature drops below 35-40 degrees. After that there isn't much heat to extract from the outside air and then either the gas furnace kicks in or the electric heat strip does the job of heating the air. if you have heat strips, I would check your breakers in your panel and sometimes there are a couple of breakers right on the air handler or furnace. The ones that will be for your heat strip are 220v and will be twice as wide as your normal 110v breakers . Please don't trust a visual inspection as they can look like they are in the "on" position but are indeed tripped. Turn them all they way off and then back on. If the beakers check out you may have an open cicuit in the heat strips themselves and you will need to have a qualified HVAC tech look at your furnace to repair it.
If your furnace is a "duel fuel" and uses natural or LP gas for back up heat then your ten year old rheem probably needs a good maintenance by a qualified service tech. There is a flame sensor to clean, ignitor to check (replaces the old school pilots), burners to clean flue connections to check and much more. ALL manufacturers of any heating apliance recommend yearly maintenance. Most companies offer something for around 100 bucks. I hope this helps.
It is normal. Your house has to go down a couple more degrees because the heat pump is not working. You can solve this by rewirng you thermostat. Take off the wire that goes to Y and tape off. Then take the wires that are marked w and e or w1 and put the wires to yellow. Do not run ac with it wired like this. If you need more information please post me back