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Arcoaire NFCX 3600C1 heat pump - blows cold air even with emergency heat on

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Check the O/B setting on the thermostat and equipment to insure the reversing valve is energized during the proper heat/ cool cycle. Also check the thermostat wireing to insure electric heat element is set up.

Posted on Feb 01, 2010

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1 Answer

Honeywell thermostats keep turning off and on and blowing cold air


Need to know the type of heat you have. If it is an air to air heat pump, with this cold weather, you are not going to get much heat out of it. It will feel cool (a little higher than room temperature). If the temps outside stay below 25 degrees, then switch it to Auxillary (Emergency ) heat.

Nov 25, 2013 | Heating & Cooling

2 Answers

I have a 5 ton goodmsn heat pump it only blows cold air the heat doesnt come on have a new heat strip in it but still blows cod air


Heat pumps require a reversing valve for heat operation on the outdoor section, a control signal to a "O" terminal or orange wire is required for heating and cooling depending on the thermostat and out door unit requirements. The thermostat also has to be heat pump type for the system to operate heat for electric system with heat strip, two stage electric heating.

Jan 31, 2011 | Goodman CKL60AR60 Air Conditioner

1 Answer

REPLACED BOTH ELEMENTS GOT HOT WATER FOR 1 SHOW THEN IT GOT COOLER AND COOLER AND NOW ITS COLD ONLY?


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 air.

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 freezing.

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 cold out.

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 recently.

It will likely blow much warmer when the outdoor temp rises.


Aug 02, 2010 | Heating & Cooling

1 Answer

On my heat pump, my thermostat is on heat the fan is running but no heat is coming out.just cold air, I even tried it on emergency heat also and its just cold air...


I am assuming you have electric heat as a back-up.
If you do make sure thre breaker switch to the electric heat is turned on for starters.

Jan 30, 2010 | Heating & Cooling

1 Answer

Heater works, but only on Emergency Mode


It sounds like you have a "setback thermostat" A control intended to increase efficiency by allowing the fan to run for an adjustable amount of time after the heater turns off, whether the heater is electric or part of a heat pump. If the "setback" time is too long, the element will cool off and the fan will blow cold air. Try and locate the instructions for the thermostat and see if the "fan run time after heat turn off" is adjustable and reduce it by half. Most emergency heat circuits bypass control circuits (its an emergency, you know), and require manual control.

Jan 11, 2010 | Heating & Cooling

1 Answer

Its 28 degrees out side and my goodman 3.5 ton heat pump package unit is blowing cold air out of all my regesters


Sounds like the heat pump is not running. Check outside to see if the fan is spinning.

Try moving the thermostat to emergency heat and see if that gives you any heat. If it does, then you have heat until you can get a service technician to locate the problem with the heat pump. It could be a wide range if issues from bad thermostat to bad wiring to bad capacitor.

Jan 07, 2010 | Goodman Heating & Cooling

1 Answer

Arcoaire heating/air conditioner continually cycles condensation


a possible solution is to install an air dryer in line with this tube

Jan 03, 2010 | Calvin Klein The Field Controls Company...

5 Answers

What's the difference between EM HEAT and AUX HEAT?


Sorry, neither of these answers are completely correct.
You have a heat pump (or the wrong thermostat). Let's assume you have a heat pump.

In air conditioning mode, it works like every air conditioner you have ever had, but...

In heat mode, it reverses its operation. Have you ever felt the air coming out of the outdoor unit of your A/C unit? It's hot, isn't it. And the air coming out of the indoor unit (out of the registers) is cold. Now for a heat pump to produce heat it simply runs the air conditioner in reverse and the heat comes out in the house and the cold is released outside. Neat, huh!

Here's the problem with heat pumps...when it is really cold outside the heat pump can't produce enough heat to heat your home. So it has an additional heat source called "Auxiliary Heat". This heat comes on automatically when the house doesn't get warm enough. The source of this heat is based on the region of the country you are in. North/Northeast generally have oil heat, other regions have gas, and still others have to use electricity to heat. In Texas, we usually use electricity as the supplementary heat on heat pumps. VERY EXPENSIVE!

Now the "Emergency Heat"...this is exactly as stated in Solution #2. This is manually turned on by YOU at the thermostat when your heat pump fails. This turns on the auxilliary heaters and turns off the heat pump (remember, the reverse air conditioner). Again, this can be quite expensive to run if your heat source uses electricity! Gas and oil may be cheaper. The emergency heat is only designed (normally) to keep the house livable (not comfortable) until the Heating Tech can get out to you and fix your heat pump.

Something else you should know. It is normal for a heat pump's outdoor coil to frost up during heating mode. It will detect this and go into DEFROST mode and melt the frost off the coil. While it is doing this, it will turn on the auxilliary heater to keep the air blowing in the house at a reasonable "warm" temperature, but it will not be as hot as normal. In fact, heat pumps produce a lower temperature heat than traditional heaters. So the air may feel cooler during heating than you are use to anyway. This is normal and is not a sign of a problem.

So what do you do: Set your thermostat to the temperature you want and set the controls for HEAT/COOL and FAN-AUTO/ON and leave the EMERG HEAT off unless your heat pump breaks.

As always, keep your filters clean and your outdoor unit's coils clean and free of debris.

Hope this explains your question for you!

Oct 16, 2009 | Ruud Central System Air Conditioner

1 Answer

Intertherm electric furace


It sounds like the coils are fine if you are getting heat. They are likely shutting down from overheating after being on for awhile. Check your filter and overall air flow to make sure it's adequate.

Mar 03, 2009 | Intertherm P3RA-048K Air Conditioner

1 Answer

My heat pump blows cold air for the first 10 minutes or so


Don't know how long you have had a heat pump but thats the nature of them in colder weather. Some people prefer to switch to "emergency heat" on the t-stat when temps fall below 20 or 25 degrees. This bypasses the heat pump and allows your back-up heat to heat the house. If your house is total electric your emergency heat is an electric furnace and it should handle the load if it was sized properly. Don't leave it on emergency when it warms up because your heat pump is much cheaper to operate than the furnace. As always, check your air filter since it can restrict the amount of air that moves thru the furnace, which is critical. Hope this helps

Dec 23, 2008 | Amana PTH123B25AJ Heat Pump Air...

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