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First, you will need a Voltage meter. Next go to the unit. If you have a split system meaning that you have an air handler and a condenser you will need to go to the air handler. If you have a package unit both the air handler and the condenser are combined in one unit. Next pull the disconnect to the unit or air handler. Take off the cover where the electrical components are stored. You will need either a 5/16" or 1/4" driver or socket wrench for that. Next find the transformer if you are unsure of what that looks like Google 120 to 24v transformer and look at the images. Now reengage the disconnect. If your working in the air handler there may be a push button switch which disconnects power to the unit whenever the cover is removed. If this is the case put a piece of tape on it to hold it down. Now on a transformer there are four leads (at least on most) two on the primary side and two on the secondary side. Put your volt meter on the primary side you should have either 120, 110, 240, or 220. If you do not have power to your transformer then you have a different problem and obviously you will not have 24volts. Now check the secondary side. If you have 24 volts then your transformer is operating correctly. If you don't change out your transformer.
If your Transformers built into the board, check the voltage into the board and ensure it is correct. Next there should be a 3 or 5 amp fuse in the board. It will look like a fuse in your cars fuse box. Pull the fuse and see if it's burnt out if it is replace it. Next put the fuse back in and put one of your leads in the spot they lead open on top of the fuse to check voltage. Take your other lead and put it to a common on the board or on ground anywhere. Your unit should be grounded so you can probably just touch it to a non painted section of the unit. Check to see if you have 24volts if you don't replace the board. Then next thing to do if you have 24 volts is to go to your thermostat. Put one lead of your volt meter on the red wire and the second lead on any other wire. If you have 24 volts then you have power to your thermostat. Good Luck!!
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∙ 10y ago
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How much power is a source unit that puts out 6 volts per channel into 4 ohms?
my butt!!
Does air conditioner blow cold air at 110volts 0r 220volts?
It blows air at how many volts it was designed for... an automotive unit will be 12 volts, heavy equipment uses 24 volts, a window unit in N. America will run 110 volts, while 220 and 440 volt systems are typically heavier household and industrial units.
In a typical 2 ton air conditioning unit what voltage engages the point of the contactor?
24 volts should engage the contactor and most likely let the 220 volts flow through.
Can installing a new digital thermostat cause a board to fail in the furnace blower?
Yes it is possible. Check the fuse on the control board. Does anything work? Do you have 24 volts between R-C?
What is the equivalent of 36 amps at 12 volts at 24 volts?
36 is to 12 as 18 is to 24.
How many volts are needed to power an airplane?
General Aviation typically uses 24 volts. Even the Boeing 777 uses 24 volts while the newer 787 is 32 volts.
Is 24 watts 24 volts?
"0" zero unless there is current flow. Watts = Amps x Volts.
How do you connect two battery for 24 volts?
Connect two 12 volt batteries in series and you will have 24 volts.
Is a freightliner fl80 truck 12 volts or 24 volts?
12 volt standard, 24 volt optional.
How do you make 2 12 volt batterys 24 volts?
Connect them in series and you will have 24 volts but you will have the same A/H as one of the batteries. Volts double but A/H stay the same.
How do you convert 12 volt trailer lights to 24 volts?
Change the trailer light bulbs to 24 volts and supply a 24 volt source to power them, in that order.
How do you get 12 volts off a 24 volt dc system?
One way in achieving this can be getting a 140 watt solar system. The reason behind this is they take both 12 volts and 24 volts.
