Question about Goodman PHKJ048-1 Air Conditioner

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Unit blowing cool air and runing all the time dont shut off

And you have to turn the stat up in order to have heat

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Bad blower relay, goodman has a sequential delay blower relay

Posted on Jan 21, 2009


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Arcoaire unit, the air set on auto, after the heat goes off cool down fan will not shut off, when I turn the unit off it will not shut off!

You either have a bad fan relay or a bad tstat. Remove the t stat from the wall (as long as its not mercury), just the cover plate and see if the fan shuts off. If so, bad t stat. If not, bad relay

Dec 15, 2016 | Heating & Cooling

1 Answer

Baxi back boiler. Heating only works when hot water is on, and cylinder stat is calling for heat (Y plan). Is this a problem with room stat?

Turn cylinder stat down turn room stat up y plan valve should move to heating check you have power from stat to valve . It may be the valve not moving over to heating side .

Nov 08, 2016 | Heating & Cooling

1 Answer

Goodman gph1348m41ac unit is blowing cool air in heat mode with mid 30s ambient outdoor temp. I turn it off then on and will usually blow warm air but this cycle is becoming more repetitive. any expert...

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.

Your outdoor stat could also be not functioning correctly and not allowing the heaters to come on until the system is turned back on reestablishing the two stage call for heat.

Tons of possibilities and not enough room to list....

Jan 01, 2015 | Goodman Manufacturing Goodman GPH1348M41 4...

1 Answer

Heat pump i dont know the model

The "R" terminal on the back of the stat should be 24 volt supply to the stat. For a heat pump, when the stat calls for heat, the "W" terminal goes hot (24 V) and should actuate the reversing valve and start the outside unit for heat. when the stat calls for cooling, The "Y" terminal goes hot and starts the outside unit without the reversing valve. The heat strip is used to temper the air while the outside coil is defrosting when in heating. You need an OHM meter to test for a short in the heat strip. A lot of installers are wiring it to heat all the time when in the heating mode if the heat output is too low on really cold days. Try jumping "R" to "Y" and the outside unit should start. Disconnect the heat strip from power while testing. This is really brief, its a big subject. Good luck.

Dec 13, 2013 | Water Heaters

1 Answer

Stat issues with GE Zoneline

Your coils on the outside unit may need cleaning.When they get dirty, air cannot flow through them to remove heat from the refrigerant. When this happens pressure increases until it trips a safety and shuts the unit down.
It won't run again until the pressure drops to a safe level. Also check your drain line..Make sure it's dripping.If not it's clogged and that will trip the safety switch not allowing water to back up

Sep 17, 2017 | GE Heating & Cooling

1 Answer

I installed 18 seer heat pump&air handler with communicating stat,i turned power on to air handler,not heat pump,stat learned air handler&heaters properly.turned power on to heat pump,stat does not...

Dont know what equipment you have but yes of course there is a fix. Turn power off to air handler. cycle power to heat pump and be sure the board is configured properly to match your outdoor unit. Then turn power on to indoor unit and likely go through system setup once again. provide model numbers of all communicating components if more problems.

Dec 10, 2017 | Goodman Heating & Cooling

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I bought the amcorair one of the inside units is not working right. IT IS SET ON 72 degrees and it does not cut on even at 66 degrees.

Hi, from what you are saying, it sounds as though you have a control/thermostat problem. You say it doesn't work right, so I am assuming it does work, but just does not come on when the stat calls for heat. Make sure you have 24 volts to the stat. Turn the fan to the on position to see if it comes on. If so, you have power. If the heat is not coming on at 66 degrees, and you have it set to call for heat below 72, you do have a problem with this stat. The room sensor is mounted in the circuitry of the subbase, or second section of the thermostat. There is nothing you can do to repair this stat, your only option is to replace it. If you have both heating and air, you will need a stat for that. If you have gas heat get a regular central heat and cooling stat, 24 volts. If you have a heat-pump, you will need a heat pump stat. The best thing to do, is shut off the power to the indoor unit. Remove the first section of the stat, it should just unsnap. You may need to pull some to get it off. Then you will see the subbase with the wire terminals. If you have gas heat, it will be marked something like this. RH to RC with a red wire connecting the two. You will have a smaller red wire coming in from the indoor unit which can go to either one. You will see Y yellow for cool, W white for heat, G green for fan. If its a heat pump stat, you will have many more terminals such as o/b, may have E and C, w-1, w-2. Draw you a diagram of the wiring and the terminals they go to. Now, remove the subbase. It will be held to the wall with a couple of screws. Take it with you, and go to Home Depot, Lowe's Hardware, O.S.H. to get a stat. Try and find the same one, but it will not matter as long as you have the same terminals. Many stats will work on many units. Install it in the reverse order. This drawing is very important for you. This will indeed solve your problem, and is very simple to change out. If you have any questions when doing this, please contact me, as I will check in on you. It may take time for me to respond if I am on another call. Please don't forget to rate me on this, I know you will be kind! :))
A/C, & Heating Contractor PS, Don't loose the manual for your new stat!! Put it in a safe place, this is very, very important.

Nov 21, 2010 | AmcorAire UCHW-H12AF2 Split System Air...

1 Answer


I would switch to a two wire heating only stat It sounds to me like they have the boiler wired into cooling side. Do you also have to set switch on your t-stat to cooling or leave it on heating. Just curious. I would still go with two wire stat. Thanks.

Nov 11, 2010 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

I have a Y plan heating/domestic instalation.The boiler will go off and on even if the programmer is off,If the programmer is off and I turn the cylinder stat up the c/heating pump will run,i recently...

Hi the cylinderstat controls the hot water only not the heating the boiler stat controls the water temp the room theromstat controls the rads , if you have one ,

so boiler stat set on 180f or number 5 cylindersat set on 140f to 120f roomstat to your comfort , the boiler stat works as a over heat so if the cylinder stat or roomsat fail it will turn off on the boiler you should beable to check wiring from that .

Mar 10, 2010 | Heating & Cooling

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