Question about Goodman CPLT24-1 13 Air Conditioner

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My heatpump keeps running, but only drops temperature 1-2 degrees. I have a variable speed blower but I don't think that it is ramping up all the way. Air can be felt about 12-18 inches from the registers with discharge temps around 53 degrees. I have 39 degree delta across my evaporator coils. I cleaned them yesterday no change. They still freeze after about 20 minutes. My last recorded pressures were 49 low 162 high 5 degrees of sub cooling 80 ambient. Any idea what is going on with this thing? I do not have a model # but it was purchased in 2002-3 time frame and is a 13 seer rated unit.

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  • Cris Sparks
    Cris Sparks Jun 04, 2010

    What is the superheat? Is this a 410 refrigrant? Have you cleaned the condenser coil on the outside unit. Sounds like you have an airflow problem.

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You have a low refrigerant charge. Your low reading which coresponds to the temp at the coil 49psi is about 20 degrees fr. It should be closer to 70 psi depending on the ambient temp indoors. The coil has to be above freezing I usually shoot for 38 to 40. your sub cooling needs to be at least ten. And if you cant feel the heat leaving throuhg the condenser fan it aint moving it.

Posted on Jul 08, 2010

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2 Stage Furnaces More Comfort and Save Money


Two stage hot air furnaces can save you money and make your high efficiency furnace even better. With your furnace running at low fire instead of cranking up to the highest heating output in mild weather you can be more comfortable while saving money.

Many people think that they are getting the best they can get by buying a high efficiency single stage furnace. What they often don’t realize is that they could do better yet and for a few dollars more have a high efficiency 2 stage furnace that could keep them much more comfortable.


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Many of these two stage furnaces also have variable speed blowers that run at a lower speed when heating on low fire. This will also help to save money on your electric bill, because these blowers use very little electric when running at these low speeds. Air noise from the blower running at a high speed is also reduced.

If you are thinking of replacing or installing a hot air furnace, make sure that you ask your contractor to give you a price on installing a two stage furnace. The price difference probably will not be much higher than a high efficiency single stage furnace. However the comfort of the two stage furnace coupled with the electric savings will make the extra money well worth it.

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A/C Blower Motor Speed Control
The A/C blower motor speed control (19E624) is located under the A/C evaporator housing, to the left of the blower motor (18527).
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Blower Speed Override Thumbwheel
Rotate the blower speed override thumbwheel more than 10 degrees to turn OFF the AUTOMATIC blower indicator and provide manual control of the A/C blower motor speed.
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Press the AUTOMATIC button to resume automatic A/C blower motor control and remove the FAN and fan symbol from the display window.
------------------------------------------------------------------

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