Question about Amana PTH123B35AE Air Conditioner

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Heat pump is not kicking in no heat at 42 degree outdoor temp

Heat pump on two units not working.

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  • gladysstibal Oct 10, 2008

    I will try the above but according to the code light everything is fine.

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You can mount an air conditioning unit to an oil-fired forced-air furnace. A split system A/C will do, there is no need in this case to use a heat pump unless it is calculated that it will cost less to run then using oil for heating. In some cases it is efficient to use a heatpump with a fossil fuel kit that will turn on the fuel furnace when the temperature drops below the efficiency range of the heatpump.

Posted on Oct 20, 2008

  • rush2aaman
    rush2aaman Oct 20, 2008

    The key is to have both the equipment and your ductwork sized properly to get the proper amount of air to each room in the house. While fiberglas duct may be slightly less expensive to install, the metal ducting will give you much better airflow with less static resistance and much less particulates in your air. The metal will also be more durable and less likely to become broken or small animals chewing it up. Fiberglas "ductboard" is okay for some jobs but in my opinion, shouold not be used in residential applications.A reputable contractor will do a load analysis on the home and give you a report showing the proper airflow required for both heating and cooling loads in all rooms of your home.
    You may inquire about splitting the home into 2 zones with seperate thermostats since most likely you will only be spending your sleeping hours upstairs. 
    The possibilities for a good design which maximizes comfort and energy savings are many. Research your options to get the best system for your $$$.
    Consider a humidifier on the system and a high efficiency (not electronic) air filter installed and make sure the furnace is a brand name like Carrier, Trane, Lennox, etc., with a good warranty and that parts are readily available in case of a breakdown.


  • rush2aaman
    rush2aaman Oct 20, 2008

    A heat pump is a very good efficient unit. The only drawbacks are if it gets down below a certain temp, the heat pump is ineffective and it goes to an auxiliary resistive heat mode. Also, if you're used to turning up the thermostat and getting a big rush of hot air to quickly heat up a room, you won't get that with a heat pump. You should also compare electrical rate prices with the price of heating with oil to see which is easier on your bank account. Fiberglass ducts are less labor intensive to install than sheet metal ones. I don't know about actual cost comparison though. It's very hard to retrofit an existing structure with ductwork. Not impossible, just difficult.


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Could be an issue with the heating element or the thermostat..

Posted on Oct 10, 2008

  • Swilin Sampson
    Swilin Sampson Oct 10, 2008

    This can also happen if the heat pump compressor system fails or if the heating load is greater than the unit capacity. Check the temperature ranges in the Electronic Temperature Limiter settings as well.

    If you checked all these, and your machines still wont work, then its best to call in a repairman to fix the issue.


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Check the wirings.the coils and also the heating element.also check the heating temprature.
also check the power outlet.
connect some where else.
and try to restart it again after five minites.after you unplug the device from the electric outlet.

Posted on Oct 10, 2008

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Posted on Jan 02, 2017

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SOURCE: heat pump is not kicking in, no heat at 42 degree outdoor temp

HI,

Most likely has a freon leak , or a control problem causing heat to turn on, or if you have a heatpump the reversing valve has a problem.

Posted on Oct 10, 2008

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Heat pumps are designed to operate only with the heat strip if the outdoor temp drops below 50 to 53 degrees F. Heat pumps use the heat from the outside and transfer it to the inside, but if the temps outdoors do not hold enough heat, it ceases to function efficiently. Make sure the unit is always clean on the inside and on the outside coiling to make it as efficient as possible. I've been in the business for 17 years and around it my whole life and I've never recommended a heat pump for this very reason. They are only efficient in areas where the winter temps are more mild.

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A heat pump on the optimal heating day (about 50 degrees ambient) will only deliver approximately 85 degree air as compared to 125 degree air from a fossil fueled furnace. The colder the outdoor air is the less heat there is available to be transferred to the living space. At 30 degrees, the heat transfer capability is getting close to negligible meaning the run cycles will be approaching continuous and eventually as the heat pump along cannot maintain setpoint, the outdoor stat or stats will bring on auxilliary heat in the air handler.

If your ambient temp is below the 'balance point' of the heat pump, the house temp will drop a little lower and most times energize the heat strips through the outdoor t-stat. Your outdoor stat could be set too low for the heat pump to carry the structure all the way down to the balance point so when you turn it off and back on, the lower indoor temp automatically brings on the heat pump plus a heat strip or two, thus the warmer air. Second stage on the stat satisfies due to the heat strip, drops them out of the circuit and the heat pump is left running on first stage heat delivering the perceived cold air.

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Hi,My remote do not get the good temp in my house. Ex: I set to 80F in heat mode but the thermopump operate slowly and dosn't get hire than 70-72F. The remote see the unit and all. Is the sensor in th


You have a heat pump.
Once the outdoor temperature falls below 36 degrees, heat pumps will sharply lose their ability to heat.
If you are getting a 72 degree indoor temperature when the outdoor temperature is 28-30 degrees, the heat pump is performing up to spec.
On heat pumps, the air coming out of the nearest air vent to the unit should be heated approximately 40 degrees warmer than the air entering the unit.
If you have a 70 degree indoor air temperature, the heat pump should be supplying 110 degree air at the closest air vent to the indoor unit.
Gas heat is a much better heating source where outside temperatures are commonly below 36 degrees.
Even electric furnaces perform better than heat pumps under these conditions.

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Assuming this is a heat pump I'm guessing you have a bad temp sensor. Your outdoor fan is likely controlled by a temp sensor so it only runs as needed during heating. Fan not coming on and compressor still needs cooled therefore compressor protection kicking in?????

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first thing you need to check is if the reversing valve is working you maybe running your A/C with the heat strips on depends on the t-stat your using some heat pumps will bring the strips on with a high degree difference in setting and room temp .

1- turn t-stat to heat set temp 10 degrees above room temp if you have a programable t-stat it will have a time delay on it allow to for the outdoor unit to come on 2 to 5 minute usually .
2- walk around to the outdoor unit when it comes on feel the big line the insulated one and see if it is hot or cold let it run for a 5 minutes peel back the insulation and gently grab the line with your hand it maybe real hot so be careful if this line is hot then your heat pumps is working mechanically and if it is just warm then you may need the charge topped off

there are so many different option's from this point i will need to know the findings of this test first thanks : Michael

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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.


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2 Answers

Heat pump is not kicking in, no heat at 42 degree outdoor temp


HI,

Most likely has a freon leak , or a control problem causing heat to turn on, or if you have a heatpump the reversing valve has a problem.

Oct 10, 2008 | Amana PTH123B35AE Air Conditioner

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