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What is the coldest outside temperature will the heat pump work, would it make a difference to enclose the carport where the unit is placed

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Most units stop exchanging around 33 to 34 degrees ambient temperature.

Posted on Dec 19, 2016

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Hayward heatpro running but not heating. The "run" light is yellow but it should be green


i have found nothing in any of my heater manuals to account for the color of the light. in every instance, the light is either lit or not. the color does not change.
as for the not heating, if the outside temperature is less than 60 degrees, your heat pump will not work well. as heat pumps do not heat water very efficiently, there may not be a noticeable difference in water temp. the best way is to measure the temperature going into the pump (outside ambient temperature) and the temperature of the air exiting the top of the heater.
if the outside temp is 70 and the air out of the heater is 65, there is a 5 degree temperature applied to the pool water. this can be diminished due to transfer of heat to system

Jun 09, 2015 | Hayward 116k BTU HeatPro Digital Heat Pump...

1 Answer

Hi,My remote do not get the good temp in my house. Ex: I set to 80F in heat mode but the thermopump operate slowly and dosn't get hire than 70-72F. The remote see the unit and all. Is the sensor in th


You have a heat pump.
Once the outdoor temperature falls below 36 degrees, heat pumps will sharply lose their ability to heat.
If you are getting a 72 degree indoor temperature when the outdoor temperature is 28-30 degrees, the heat pump is performing up to spec.
On heat pumps, the air coming out of the nearest air vent to the unit should be heated approximately 40 degrees warmer than the air entering the unit.
If you have a 70 degree indoor air temperature, the heat pump should be supplying 110 degree air at the closest air vent to the indoor unit.
Gas heat is a much better heating source where outside temperatures are commonly below 36 degrees.
Even electric furnaces perform better than heat pumps under these conditions.

Nov 30, 2014 | Heating & Cooling

1 Answer

No heat from air heat unit


Heat pump will only work when outside temperature is above minus 13 celcius or 9 far. Efficiency at lower temperature lower very quickly, spend more energy than what it produce. Good quality machine or option will de-energize outside unit from operating. Wait until exterior temp get warmer and try again.

Jan 03, 2014 | Heating & Cooling

1 Answer

I have a Hunter 44428 Thermostat and even when the switch is in "Normal" mode (for heating), the display says "Emerg". Why does it say that? I even made sure it was definitely in "Normal" and not even...


your unit is likely equipped with an outside temperature sensor that switches the heat pump to emergency heat when the outside temperature is too low for the heat pump to work efficiently. This is common

Oct 29, 2013 | Heating & Cooling

1 Answer

I have an armstrong heat pump and am curious about how the defrost cycle works.


Rather lengthy but here it is.
The outside unit(heat pump) has a reversing valve, a defrost board, a crankcase heater, a metering device(txv or piston) and an accumulator. This is what makes it a heat pump instead of a straight air condensing unit.
When in the heat mode the outside unit becomes the evaporator and the inside unit becomes the condensing unit.Before somebody corrects me i am just stating what is different in a heat pump.
When the system goes into defrost several things happen. First the system has to call for a defrost cycle. This happens on a time and temperature sequence. When the defrost board times out for a defrost check(the defrost board has a jumper pin to determine how long before the system will check for a temperature(thermal switch) is open or closed. This switch is in the normally open position. It will close at 35 degrees(depends on the switch). This switch is located on the copper line in the condensing unit. If this switch is closed then the system will go into defrost. Now for the good part. This will shut down the outside fan, switch the reversing valve, and the outside unit will essentially go into cool mode. Because the fan is off the compressor will heat up very rapidly and the refrigerant passing thru the coils will be hot as well. This will cause the ice buildup on the outside unit to melt(defrost). This will continue until a temperature is met or it times out. Then the system will return to the heat cycle. One other thing, depending on how your system is wired the inside unit will turn on the auxillary heat while the defrost cycle is in process. That way you will still have heat while the defrost cycle is in process.
It is not uncommon for steam to come out of your outside unit while this is going on. It can also be quiet noisey sometimes.
Hope this explains what you wanted to know. If not just reply to this with any other question you have about the cycle.

Sep 14, 2011 | Heating & Cooling

2 Answers

I have a Rheem heat pump/air handler; it draws 2.9amps with only the fan running, 13amps when the heat pump is running and 38amps with the heat strips on. My question is why the unit draws that many amps...


Sounds like it must be about a 2.5- 3 ton system. The 13amps has to be the compressor draw -normal. and 38 on the strips- normal. 2.9 fan -normal.

You may want to check your wiring to see where the outside unit gets its power. Theres nothing inside that can draw 13 amps. That almost has to be the compressor power wire.

Jan 27, 2011 | Heating & Cooling

1 Answer

I have a Lennex heat pump unit which was installed in 2008. Our area (Savannah, GA) has experienced some abnormal cold temps lately. Yesterday, I noticed the outside of the unit had frost on the unit. ...


Heat pumps are the same as an A/C unit only it works in reverse. Instead of blowing cold air inside and hot air outside it blows hot air inside and cold air outside. The heat being blown inside is extracted form the cold air outside. Its called Latent heat Latin for hidden. Believe it or not even though its 20 degrees outside there is still heat in the air. Example if you want to drop the temperature of a freezer from 20 to 10 degrees you have to remove heat .I know your getting unusal weather and that is the problem. Heat pumps can only work no lower then around 20 degrees outside.Heat pumps are never used above the freeze line. With your unusal temperatures thats basically where you are now. Ride it out. When your temps rise a little your be fine. Im in Chicago.

Jan 15, 2011 | Heating & Cooling

1 Answer

HEAT PUMP OPERATION FOR TEMPSTAR SMART COMFORT 2400, MODEL THC436AKC1. LOWEST OUTSIDE TEMPERATURE FOR OPERATION?


I have installed many heat pumps and if it is installed without and ouside temperature sensor I would not recommend running it below freezing 32 degrees farenheheit. Running a heat pump at low outside ambient temps. can hurt your compressor and that is the most expensive part of the outside unit.

Dec 20, 2009 | Heating & Cooling

1 Answer

Heat pump auxiliary heat does not turn on


Turn up your outside thermostat in the outside unit.
You should have about 3 degrees difference in one stage to the next. So I would change the thermosat with one that has three stages of heat.

Nov 25, 2008 | Honeywell TH4210D1005 Heater

1 Answer

Goodman PHJK048 Heat Pump Package


ok...where to start.lol ....the thermostat is just a switch.It will tell the unit to run or not run.if you measure the temp with the heatpump running,the air is warmer than 68 but it feels cool to you because your body is 98.6.The unit will run more often and for longer periods when the temperature drops outside for a few reasons.First,your house has more of a load to heat,meaning you have more heat loss because of the difference in temperatures outside and inside.Second,your heat pump pulls heat from the outside air.The colder the air outside,the less btu's for it to pull.If you have anymore questions hillbuck29@aol.com Hope this helps,Dave

Nov 10, 2008 | Goodman PHKJ048-1 Air Conditioner

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