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Wiring diagram is normally included and fixed to the inside cover of the electrical end cover of the control compartment. Instructions for wire size required and fused disconnect should be on the unit name plate.
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Your unit is April 2003. So it is 8 years old. P3D is model ref 0304 is year/month of manufactor. You also have a 2.5 ton system. Hop this helps. Info verified through local Intertherm distributor.
Hi, This is a very popular unit. Call you're local wholesale a/c parts house with all of the info on this 2 1/2 ton unit, and they can help. Have you tried going online to search for this? Would also try this. Good Luck, Shastalaker7
Intertherm is Manufactured by nordyne Inc.
Id recommendwww.nordyne.com
At least they could get you to the write people that may have the info you need.
I am sure there is one to download. If google is no help, just ask some deep web specialists, e.g. http://manualfox.com - this is a manual search agency and if they don´t find it, it does not exist in the Internet.
If you don’t see any frost on the suction line or big line on the furnace
(that goes from the furnace to the outdoor unit) and the filter and coil are clean then you are probably low on refrigerant.
In general terms an electric unit uses a 20 x 20 x 1 filter and a gas system uses a 20 x 25 x 1 filter. If the return filter is somewhere other than at the unit, it will very greatly in size. Its the descretion of the installer as to what size filter they choose to install.
There is no reset button on most of these units. If nothing is running at all when a call from cooling from the thermostat is made your problem could be a tripped or breaker in the off position. When you turn the thermostat to cool have someone listen for a click at the unit. If no click is heard it may be in the low voltage circuit that your problem is. If a click is heard which is the main contactor pulling in to run then your problem may be in the high voltage power supply. If you have a fused disconnect check the fuses. They should be of the time delay type (slow blow) and sized according to the ampacity on the unit name plate. Also check the main breaker in the house power panel.
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