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My heat pump emergency keeps coming on and smeel smoke

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Thats normal, smell should clear after it runs for awhile.

Posted on Dec 05, 2016

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We have a new a/c and the system has heat strips. For a/c. we have had the thermostat set on AC at 72degrees. Now that it is getting colder and may need some heat in the house, do we switch the...


If your thermostat has an emergency heat setting this means you have a heat pump system.
Yes you need to set the thermostat to heat for heating the house.
The emergency heat setting should never be used unless your outside unit is not functioning.
The emergency heat setting overides the heat pump (the outside unit will not be energized).
The emergency heat setting will run the auxillary heat (heat strips) only.
When the thermostat is set in the heat position the heat pump will run to heat your house.
If the heat pump can't keep up (extreme cold) then then the auxillary heat will kick in to augment the heat pump until it satisfies the thermostat settings. If your room temperature gets 2 degrees below your thermostat setpoint, your auxillary heat will kick on. Example, say you are going to be gone a couple of days and you turn your heat down to 60 degrees. When you return and it is 60 degrees in your house, you turn the thermostat up to 70 degrees. Since you are turning the temperature up 2 degrees or more (10 degrees in this case) from the 60 degree room temperature then the heat pump will come on and the auxillary heat strips. The unit will continue heating like this until the temperature in the house gets to 69 degrees and the heat strips will turn off and the heat pump will continue to run until the 70 degree setpoint is reached.
Hope this helps.
SeagullAC

Sep 15, 2011 | Heating & Cooling

1 Answer

My outside heat unit is frozen and it is 10 degrees out, will it thaw while I have it on emergency heat? How long do I keep emergency heat on?


Switching to emergency heat will not defrost the unit.

If the Heat pump is malfunctioning, continue to use the emergency heat until the unit can be repaired properly.


At ten degrees, no heat pump can keep up., but it should be automatically bringing on the heat strips as back up heat. (same thing as emergency heat, it's just automatic.)

Either the extreme cold is overloading the defrost system, due to lack of properly operating exterior temp sensors or the defrost is malfunctioning,

Feb 07, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

2 Answers

My Honeywell thermostat does not heat the house to the selected temperature. It will come on but not long enough to heat the house to the temp I selected.


Verify that you have heat coming from the vents.
Also do you use a heat pump system with electric emergency heat?
It may be that if it is to cold outside that the heat pump can not handle the load due to the cold outside and you will need to turn on the emergency heat.
Keep me posted.

FlaTech.
Thank you for using FixYa!

Nov 17, 2009 | Honeywell Heating & Cooling

1 Answer

I only have two settings. Which is which and how so?


I think you probably have a heat pump. Aux heat is electrical resistance heat coils that produce heat when the heat pump can not produce enough to keep the temperature up (caused by low outside temperature or a problem with the refrigerant system). This resistance heat can be switched on by the emerg. heat button. It also can come on automaticlly (sp) and will be indicated by the aux being shown on the thermostat. Sometime if you set the heat up several degrees by thermostat the aux will come on to help the system catch up to the desired temperature setting. The emerg. heat is a way to turn on the AUX manually. If you do not have a heat pump system then it is possible that you have a heat pump thermostat installed on a non heat pump system. Emergency heat and Aux are both the secondary.

Hope this makes sense1

Bob

Oct 17, 2009 | Ruud Central System Air Conditioner

3 Answers

EM HEAT.... does it stand for ECONOMY HEAT or EMERGENCY HEAT? They both conflict. Someone's misinformed.


It stands for Emergency Heat. (Back up heat) . Normally you will find it on heat pumps. It's used manually when the compressor goes out on a heat pump. It's used automatically by the unit when it's so cold outside the heat pump can't keep up. This happens when there is not enough heat in the air to draw heat from. This happens at around 23 degrees. I hope this explains what emergency heat is and what it's used for.

Oct 16, 2009 | Ruud Central System Air Conditioner

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

White smoke from the engine


Give it some time, probably cleaning out some residual from somewhere.....if it returns consult the people who worked on it...Keep all fluids topped up....if you had blown gasket your oil would be a milky brown...Good luck to you friend...Tim

May 13, 2009 | 2006 Aprilia Atlantic 250

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Stackable washer unit will not spin. Keeps breaking belts.


either the motor is locking up or there is a bearing going out

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Heat pump cycling on and off.


It sounds as if you you have a low charge of refrigerant, r22. When the unit comes on outside, the outdoor coils become the lowside, there is a low pressure switch that is tripping out contactor protecting the compressor.

Mar 11, 2009 | Heating & Cooling

3 Answers

Emergency heat comes on everytime heat pump starts UPKA025JAS


Your white wire is controlling the heat for your strips. while the blue is for the heat pump side of heat. But if you disconnect the white be sure to wrap tape around it so it doesn't contact any other wire. Would cause a short and you would loose a transformer.

Jan 25, 2009 | Heating & Cooling

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