20 Most Recent Weather King 12AJA4801AH Air Conditioner Questions & Answers

Go to http://rheemac.com and on the left side of the page is a box to locate a dealer. Key in your zip code and call a dealer in your area. Dealers can download manuals for current and/or older models and can then e-mail the manual to you as a PDF file.

Sounds like it it isn't the igniter but probably the pressure switch. You can only tell by the clicking noises as they system goes through it's safty checks prior to the call to the igniter.

go on the Rheem or Ruud web sight WeatherKing is made by them

you are missing some numbers after the JA and with the 8 in there I would say you are missing a 4. That would make it 10AJA4801 which would be a 10 SEER 4 ton

yes, and 12 SEER for the 12aja

yes.

www.rheem.com/contact I believe it was made by Rheem.

12,000 btu equals one ton. The model number starts with 12, so it's a 12,000 btu unit which equals one ton. Garcuda

If the gas lights & doesn't stay on, then there is a flame sensing issue. Remote sensor may have flame impingement (dirty). Clean flame rod sensor with light sandpaper or cloth.

Here is the ignition sequence for a spark ignited furnace. This will help you understand what is happening/not happening.

Thermostat calls for heat.

draft inducer motor (DIM) starts drawing draft through heat exchanger.

Pressure switch detects proper operation of DIM, and sends signal to board to begin ignition.
(it detects negative pressure)

Ignitor starts ignition attempt and gas valve sends gas to burners.

Upon ignition, flame sensor detects flame and sends signal to board stopping ignition sequence and continuing gas flow for heat mode operation until thermostat is satisfied.

During this sequence the blower motor is brought on, and by using a series of temperature limit switches, the system assures that the unit is operating properly.
(If the blower is not operating, or the airflow is inadequate, the heat exchanger will overheat and trip one or more temp limit switches.)

There is also a "rollout" switch that detects improper flame pattern "rolling out" into the controls compartment.

Now, to apply that to your situation.

If you have no spark, than the failure is happening before the gas is supposed to be flowing.

That usually means a failure at the D.I.M. Typical causes for that are a clogged flue pipe/vent, damaged/deteriorated fan blades, bad fan, or bad pressure switch.

If one of the temp limit switches or rollout switches have tripped, it will simply shut off the system.
(Some units will turn on the blower motor and shut down everything else.)

You can try resetting the unit by disconnecting power for 1 minute, and attempting a restart.

First look for any flashing LED lights. If you see any locate the wiring schematic (usually on the inside of the front panel) and look for the flash codes.

If the reset does not solve the problem, let me know what flash code you are getting, and/or let me know exactly what you see the furnace doing, in detail, after the restart.

Stuck pressure switch. Try removing small tube at inducer draft motor and pressure switch, located in the heating compartment, and making sure line is clear. Also try cleaning out small nipple on draft motor assy. with a small wire or paper clip as these get clogged easily too. You can also hook the small tubing to the pressure switch and blow and suck in and you should hear the switch opening and closing. The draft motor running is what causes the negative pressure to pull in that switch. Any debris or clogged with stop operations. Also make sure the flue is unrestricted if that doesn\'t fix it. Hope this helps. Happy Holidays!

replace igniter