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Crank Case Heater for a Air to Air Heat Pump

What does it do and will it help produce more heat quicker, and where and how is it hooked up

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The heater is in the bottom of the compressor in that round hole to keep the compressor warm in the winter to help on start up

Posted on Nov 23, 2008

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Heater, ac and fan speeds all working fine. Compressor not kicking in...just auxiliary heat working.


Outside temp too low, so outside thermostat and it's settings will not allow the heat pump to work. But insist on the ausilary heat to work instead. Heat pumps usually do not produce enough heat when below 40F outside temp. If you have Gas heat, it may be more economical than the heat pump below 40F. If electric auxilarry heat, it may compete at 32F. Talk to your dealer, installer, or manufacture.

Mar 04, 2015 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

Every time my heat pump turns on, the blue auxilliary light comes on, and it only blows icy air. I do not want to use that much power, so I turn it back down a few degrees. Now, it is 50 degrees in the...


A heat pump starts losing efficiency below 30F or so. The aux. heat helps the heat pump keep up with heat demand. The Aux heat can be electric heat strips or another type of heat. Check to make sure you have power to whatever type of aux heat you have (breaker not tripped, no overloads tripped). If it is electric heat check the heat strips to make sure they haven't burnt in to. Hope this helps.

Jan 10, 2010 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

Lg window-type ac


Most little window units are mainly for 300-500 Square foot rooms.
Should be putting around 80-105 degrees top out of those little units, Make sure that your thermostat is set for heat rather then the normal setting of cooling (Turn more towards Heat) also if you have a fan setting you may want to try lowering the fan to low speed vs high fan, which should give you more heat.
Make sure the Filter is clean as well as the coils behind the filter or it will shut down the heaters quicker due to lack of air, shutting down your T-stat and bi-metals quicker.

Good luck!

Nov 11, 2009 | Air Conditioners

1 Answer

When the heater is turn on the generator is draged down. The a/c works fine no problem with the generator.


Unless it is a Heat Pump type Air conditioner, which uses the Compressor to heat, then what is happening is your using electric heat which will pull quite a bit more power.
If you look at the Model number plate on the Ac it should tell you what size heater (KW) you have.
If it is electric you are pulling more amps then the Generator is Possibly made to produce.

Hope this helps.
Good luck!

Nov 03, 2009 | LG Air Conditioners

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

My heat pump doesn't produce cold air. The compressors come on but the condenser fan doesn't. Any suggestions??? Thanks George


A heat pump has more than just the contactor to contro the condenser fan, if it is getting power to the fan then repalce the fan and the capacior, if ther is no power it could be the defrost control sensor, or the defrost board, as the fan must shut off during the winter to provide a quicker defrost when in heating mode, hope this helps...

Jul 13, 2009 | Air Conditioners

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 | Air Conditioners

1 Answer

Carrier Thru-Wall Heater and Air Conditioner won't heat


http://www.residential.carrier.com/support/troubleshooting.shtml
Here is some troubleshooting tips.
Also service available.

Feb 25, 2008 | Carrier 52PQ307 Wall/Window Air...

1 Answer

Danby dpac8099 4 in 1


Ciny, just a question, does yous system come with a heat pump(heating cycle)?  if so is it an electric heater or is heat produced by a change over valve?   there a thermal fuses and solonoids to check which requires testing.  need an appliance techi. 

Oct 13, 2007 | Danby DPAC9030 Air Conditioner

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