Question about Weather King 12AJA4801AH Air Conditioner

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Transformer weather king firnace keep blowing transformer

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What you need to do is isolate the loads that are on the transformer and put a amp meter on the transformer and read the amps while you put the loads on one at a time. the one that spikes is the one thats bad. You can put a inline fuse in to protect the transformer. A 3 AMP fusw qould be good for a 75 va transformer if its a 50 va you would need a 2 ampo fuse.

Posted on Jan 13, 2009


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My weather king will not run on heat or cool. The fan will not run when switched to on. Have proper power to and through the units breaker. Put in new low voltage transformer.

Put the red wire from the secondary/24 side of transformer directly to the green. If blower works the problem is outside of machine. Check for small blade style/ car like fuse inside, check float switches.

Jun 15, 2017 | Weather King Heating & Cooling

1 Answer

Air handler keeps blowing out transformer

Does it call for a 24v transformer? How many amps does it need. If you have the wrong amps. that can cause issues.

Jan 06, 2014 | Heating & Cooling

1 Answer

Not working keeps blowing transformer

If the transformer is blowing then you have the wires shorted somewhere. Trace down the thermostat wire and correct the short. To keep from ruining a transformer install an inline fuse on the low voltage side. How it works: transformer 101

Feb 10, 2011 | Heating & Cooling

1 Answer

Have had ice and snow here in ATL. Today heat in Weather King RCBA 3765 GG17 would not come on. Checked Breakers, A/C breaker was tripped. Reset breaker, checked for ice in condenser (W/K 10PJA 3701),...

Try R to G instead. The red is the 24v side. Greeen is the blower. You should also have 24v ac between r and c (brown or black) at the air handler. You can check at the condenser for power also. Turn the unit on at the thermostat and go outside to check thermostat wires between y and common (probably brown or black). Possible a transformer went bad. If it were a problem with the air handler or the condenser, one would run and the other wouldnt. In this case neither run so you have to look at what controls both. I say transformer or thermostat. If you find 24v in either place, its not the transformer.

Jan 18, 2011 | Weather King 10PJA2501AH Air Conditioner

1 Answer

No power to the thermastat

There is either no power to the air handler or the transformer has burned out...

The power to the t-stat comes from there....if your lucky the transformer is fused and the fuse has blown...if you replace it and it blows again then check for a short in the low voltage...

Hereis a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

Air Conditioner Trouble - Review the Possibilities


Oct 12, 2010 | Weather King 10AJA6001AH Air Conditioner

1 Answer

Weatherking Furnace will now turn on. Can get blower to work

Does your outside unit run. Does the inside unt try to run. If not you may have control problem. Check voltage on transformer. It should be 24 volts. Rus

Mar 20, 2010 | Weather King 10AJA3601AH Air Conditioner

1 Answer

Weatherking gas furnace and need help with transformer wiring

on 120v units most likely will be white should be common,black should be hot,brown to capacitor, and green to ground transformer sounds to be wired correctly.

Jun 26, 2009 | Heating & Cooling

1 Answer

Can't turn any part of 12AJA4801 on.

t-stat r and rc togather to furnace r
t-stat w to furnace w
t-stat G to furnace G
t-stat y to furnace y
on the furnace y their should be one cable with 2 small wires 1 goes to y the other goes to the neutral of the transformer terminal C turn the power off so ya don't short the transformer if its not all ready bad. Good Luck Tom

Jun 25, 2009 | Weather King 12AJA4801AH Air Conditioner

1 Answer

Weather King split AC system.

Turn the power off ,and check all the electrical connections for loose connection or wires. also make sure these are slow blown timmed delayed and not one-time fuses. Thank-you verymuch!

Aug 30, 2008 | Weather King 10AJA2501AH Air Conditioner

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