Question about Goodman CPLE24-1 Air Conditioner

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NO HEAT BLOWER COMES ON IN MANUAL OR WITH AC BUT NOT WITH HEAT. HEATING COILS HEAT UP AND THEN SHUTS DOWN

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A blower relay usually has a set of closed contacts that go to the  motor and when the 1st element comes on the power goes on through the sequencer and then these contacts and to the motor heating speed. If you have a blower in AC and with the fan sw to ON u can run the blower on manual 100% of the time until someone can come look at it and the heater coils will cycle on and off with the thermostat. Dont worry about the cost compaird to the elements the motor is nothing and the heat it generates is going into the heated home anyway. 

Posted on Feb 28, 2009

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Posted on Jan 02, 2017

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Why does my PTHP. shut off and switch to electric resistance heat?


im guessing its there way of defrosting the coils , as with this type (small) its tough to defrost the coils in an efficient way , hp runs normal to within one or two degrees of setpoint , hp shuts off or reverses in low speed , back up heat comes on to complete the room heat and to generate the heat needed to defrost the coils , entire unit shuts off when set point is reached , reversing valves set for heat and wait till next cycle

now mine does something slightly different : it runs for fifteen minutes and if set point is not reached it switches to back up and reverses the coils ,leaves compressor on (low speed) , this heats the coils up and defrosts the outdoor unit , and if it runs long enough twenty minutes total time , it goes back to normal and aux heat shuts off . this drives me insane thinking how much im spending on heating the outside !! but im sure its needed to prevent ice build up on outdoor coils ,and I sure don't want that cracking with ice formations

Jan 30, 2016 | Amana PTH153B50AJ Heat Pump Air...

Tip

Why your unit is freezing up.


To understand why your AC or heat pump is freezing up, it helps to know how your system works.

There are 7 major parts to an AC system, 9 with a heat pump.

1 - Condenser/heat pump (The outdoor unit)
2 - Air Handler (the indoor unit unless the system is a package unit, then all is outside in one system. The air handler is usually found under the home, in an attic, or in a closet.)

In the condenser are the following major parts.

3 - Compressor
4 - Condenser coil
5 - Condenser fan
6 - (HPs only) reversing valve

In the air handler are the following major parts.

7 - Blower motor
8 - Evaporator coil
9 - (HPs only) electric heat strips

Some systems known as "dual fuel systems" use another heat source in place of the heat strips, usually a gas furnace. I will address gas furnaces in another post.

When an air conditioner is operating properly several things are taking place.

1 - The compressor is compressing or "pumping" refrigerant through the system.

2 - through changes in pressure, the refrigerant makes the evaporator coil get very cold, and the condenser coil gets very hot.

3 - The blower motor/fan circulates air across the evaporator coils, as the room temperature air (Also known as "indoor ambient") goes through the cold coil, it exits, cooled approximately 15 to 20 degrees cooler than when it entered. (In a ducted system, the blower is also the fan that circulates the air throughout the home.)

4 - The condenser fan circulates air across the condenser coils. As the outdoor air goes through the condenser coil, it removes heat from the coils that are very hot. This in turn removes heat from the refrigerant so it can run its cycle again, and through pressure changes, cool the evap coil.

5 - With a heat pump, the reversing valve reverses the flow of refrigerant in the condenser and evaporator coils.
In AC mode, the evaporator coils get cold, and the condenser coils get hot. But in heat mode, the evaporator gets very hot, and the condenser very cold.

Now, whichever coil is getting cold will freeze up if there is inadequate air flow across the coil, as the refrigerant in it is far below freezing, and there is not enough airflow to keep the humidity in the air from freezing on the coil.

Things that can cause poor airflow are,

1 - Dirty/clogged coils
2 - dirty/clogged filter (will only effect evaporator coil)
3 - Closed/blocked vents (will only effect evaporator coil)
4 - Malfunctioning or dirty fan

Low refrigerant will also cause a coil to freeze up, reduce efficiency and cause the system to run for long periods of time. Not to mention, shortening the life of the unit.

With a heat pump, in heat mode only, the condenser (outdoor) coil will routinely begin to freeze up in cold temperatures. This is due to the fact that the refrigerant is below freezing, and the cold outdoor ambient temp is not warm enough to keep the condensation in the air from freezing on the coil.

Note, a properly working AC should never freeze up.

A heat pump is equipped with defrost controls to prevent ice buildup.
Some are controlled by timers, some by temp.

When a HP is going into defrost mode, the condenser fan shuts down, the reversing valve reverses the flow of refrigerant and the once cold condenser coil now gets very hot, defrosting the coil. (Many people have said this process sounds like the unit is coming apart, or about to explode and are frightened by the "smoke" which is really just steam from melting ice that comes off the unit.)

During defrost mode, the secondary or "auxiliary" heat comes on to ensure that you are still getting warm air from the vents. (Again, this can be electric heat strips or a dual fuel system)

If you are experiencing cold air from the vents during defrost, that means your auxiliary heat is malfunctioning.

The auxiliary heat is used for three purposes.

1 - during defrost mode to maintain warm airflow (automatic)
2 - when the HP cannot maintain the set temp due to extreme outdoor temps. It comes on when the indoor temp drops several degrees below the set temp on the thermostat (automatic)
3 - For emergency heat source when the HP is not working. (Manual)

To recap....

Iced up coils?

Poor airflow
low refrigerant
Malfunctioning fan
failing defrost system


There are two things that can be done in a pinch to help de-ice frozen coils. This may get you by until the repairman can get there, or you can fix the system if you are a do-it-yourselfer.

HPs frozen outdoor coil in heat mode, not going into defrost?

Cover most of the vents, and turn the system onto cooling mode until the outdoor coil is thawed. then uncover vents and return to heat, or emergency heat. (this usually takes 15 min or less)

Frozen coils in AC mode with a heat pump?
Turn the system to heat with the thermostat on just high enough to get the system to come on. (again, usually takes 15 min or less to thaw.)

AC only, with frozen evap coils? (this can sometimes be seen frozen all the way outside to the compressor on the copper lines.)

Turn the system off, and the fan switch from "auto" to on".
This will usually defrost the coils within 1 to 2 hours.
(If your system has the furnace in line before the evap coil, turn the system to heat, and the furnace will defrost the coil within minutes.)



on Dec 25, 2008 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Ac unit runs, inside blower shuts off after 2 mins, compressor continues to run, t-stat still calling for cool


My central AC unit decided to stop on the hottest day of the year. It would start and run normally for a few minutes and then the blower would shut off. After checking the breakers, thermostat and overflow shut off (did not have one) I saw something about a blower motor capacitor. This was easy to get to and replace and my last hope before waiting for someone to come fix it. The capacitor cost $4.04 with tax and had my AC working again. Needless to say I was beyond happy. I hope this can help others with a similar problem.

May 20, 2012 | Heating & Cooling

1 Answer

I have an intertherm electric furnace. the heat coils heat up then system shuts down


It is possible that high temp limit is shutting you down.make sure your blower is running when t-stat is calling for heat.if notstart at the heat sequencer which cuts the blower on with first bank of heat. it will be dangerous and difficult to troubleshoot this prob without a multimeter and experiance with elect. components

Nov 05, 2011 | Intertherm P3RA-048K Air Conditioner

1 Answer

My electric heater is on off why is there warm air coming from the furnace is this normal


That is not normal. It is normal for the sequencer to shut down in an orderly manor however. The heating needs being met the the power is shut down to the sequencer and it shuts down when the bi-metal inside it cools down. If all of the coils and fan were energized the load would be too much so the heating coils are powered up in stages. That does 2 things. Keeps from tripping the breaker and ensures warm air comes out the vents when the fan comes on. You may have a problem with a sticky sequencer.

Nov 13, 2010 | Heating & Cooling

1 Answer

My compressor shuts off after a few minutes


Hello
One possibilty is the out side coils or condenser is dirty.And the unit is shutting down on high heat.

Try cleaning the outside coils with some simple green cleaner or even comet spray, then rinse with a hose.

May 27, 2010 | Frigidaire FAS296R2A Air Conditioner

1 Answer

Coleman evcon blower not working properly


My Coleman Evcon ac unit,heater and blower does not work.not even the outside condenser comes on.Any ideas on what is the problem?

Jun 22, 2009 | Coleman Heating & Cooling

1 Answer

Goodman PC060-1B Package AC...Need Wiring Help


Depending on the size of your Electric heat you can use one set of wires because your unit does not run with the heat like the heat pump. The large set of wires going to the electric heat should be used. You may have to jumper a new set to the contactor. On Goodman unit come in L1 and L2 jumper to contactor. Very simple good luck. Rus

Jun 21, 2009 | Goodman Heating & Cooling

1 Answer

Intertherm heat coils won't stay off until breakers off,thermostats are off


it is the heat sequencers. it happens all the time. replace them wire by wire to keep it simple. they are located behind the metal next to the breakers they look like this: cdf7518.jpg

Oct 19, 2008 | Intertherm P3RA-024K Air Conditioner

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