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I need transformer secondary burned out, can't find one need cost please.

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Not sure what transformer exactly you need nut I am assuming it is a 24v HVAC type....

Check these out

I hope that they are what you are looking for...


Posted on Sep 15, 2010

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I install a new limit switch and now something keep burning out the transformer i replace it also and something keep burning it out what the problem could be

All transformer comes with a current limit specification in terms of VA units. For example a 24 v secondary coil with 6 VA specification only can hold a current of of 4 amps for a short period of time. So to prevent that it burned out you only pass an 80% of that current, then it really can hold 3.2 amps continuously.
Other possibles causes for burning the transformer are:
1. Accidentally connecting the primary and secondary reversed, the secondary can not manage the voltage and current of the primary .
2. A coil or device that is connected to the secondary is demanding to much current because is shorted or stuck in a position causing an increase on current.
3. The primary have multiple taps to operate on different voltages and the combination is wrong.
3. Faulty wiring. Some times the insulation of the wires became worm, cracked or melted, with the wires torches the metal a short is produced and the transformer burns. Check the wires carefully.

Hope these tips help,.

Jan 08, 2016 | Heating & Cooling

1 Answer

How to identify the matching transformer terminal by means of terminal resistance? and which terminals is for input or output?

Doing a resistance test on a transformer will not give the information you require as you will read very little, if any resistance. What you need to do is an impedance check and that gets involved. If it is a normally wound transformer, not an auto transformer, you can isolate which is the primary and the secondary windings. Unless the transformer is a multi voltage input unit, the primary side will have continuity through only two terminals. The secondary could be more than two if it is a multi output voltage one. If the transformer is a step down, the primary windings will be the thinner wired windings and vice-versa. To actually test the transformer, get hold of a transformer with about a 20 vac output and try it across the two terminals you have identified as the primary windings, you should ge a proportional voltage of the actual output. eg. with 20 vac input and a 2 vac reading at the secondary, the actual output would be 11 vac if your mains voltage is 110 volts. Take care that you are using the transformer at the voltage it is designed for, otherwise it will overheat and burn out.

May 11, 2011 | Kitchen Ranges

1 Answer

The codes on my Armana furnance is saying I have a open primary. How can I fix this?

If you have an open primary wire, this means the transformer, or one of the Hot wires coming into the unit may be tripped. Check your breakers to see. If it is the transformer at the furnace, the primary side is the 120 volt side of the transformer. The 24 volt side will be dead due to this, as it is the secondary side. If you find you have power going to the indoor unit, but nothing is working, you will need to replace the control transformer. It is 120 Volts primary side X 24 volts on the secondary side. They only cost about $20.00 and are easy to change out. Primary side you will have a blk and wht wire. You may have several wires on the other side, but it will tell you in the directions which 2 wires to use to get 24 volts, very east to do. Look on the diagram and it will show you where the transformer is at the start of the run on the furnace. Again, it may be a blown fuse if you have a fuse box, or a tripped breaker. It will be the incoming side, that is the primary. Please rate me on my help to you.
A/C, & Heating Contractor.
PS, If you need my help contact me.

Feb 17, 2011 | Amana Heating & Cooling

1 Answer

My transformer is burned.Now I need to know what the secundairy voltages are

Transformers USUALLY don't get burned as they are usually protected by a fuse. This one supposedly uses a 3 amp fuse which should have protected it from getting burned. If you can find a schematic or if you can find the specs on the output amp power supplies we can probably calculate the voltage of secondary. We know only that it is supposedly 120 Watts and uses an 8 ohm speaker. The RMS voltage should be about square-root 120*8 = sqrt 960 = 31V*1.4 = approx 44 volts peak... so you will need to get about +/-45 volts out of the supply for headroom... which will need approximately 34 volts AC given diode drop and droop of filter caps. These are really rough educated calculations from the tiny bit of info we have.
Finding a transformer to replace this matching these requirements will be near impossible without getting device from the original manufacturer OR having your rewound.
I would first verify the transformer is bad (only plausible cause is somebody over-fused it or a winding shorted)... Remove all the secondary loads. Put a 3 amp fuse in AND put a 60 Watt light bulb in series with teh power cord to act as a limiting device to test the transformer... Note that transformers DO have a bit of odor as they are usually impregnated with a varnish...

Jan 11, 2011 | Hartke Kickback 12 Bass Amp Warehouse...

1 Answer

Hello, I need to replace my furnace control board #HH84AA015. I found the replacement part fairly quickly. Also found a bad transformer,#HTO1BC115 (primary winding indicates 'open' with ohm meter,...

Hello,The transformer (breaks) if the secondary is shorted for any reason.Also a power surge to the house/building will kill it (lighting strike/car hitting telephone pole).It might cause damage to the board.It is cheaper to try a new transformer BUT add a inline 3 amp fuse in the secondary so that will be the last transformer you have to replace(just fuses)if the short is hard to find.Power up the old board & see if it works,unless there is obvious damage.The plug sometimes comes with a new board because there is a wiring change to install it(on some) replacement boards.

Oct 07, 2010 | Heating & Cooling

1 Answer

Audio video control centre. digatal delayed surronds,model no str-d350z was plugged into wrong voltage,part burned out,can you help

You have not specified the make/model. But if you set is having the transformer as the case may be, and you have plugged into the 220volt with the 120 volt settting, then the transformer would have burned off. If so identify the secondary voltage of the DC cicuit and use a 220volt transformer to replace. If you are not able to identify multiple tappings then you must get the primary of the burned tranformer wound for 220volts. If at all this is aSMPS unit then you will need to replace the full unit as the ratings inthe power will be different.Since you have not specified details of voltage and ratings,I am not able to advice more. Hope you decide. Good day

Jul 23, 2010 | Sony Electronics - Others

1 Answer

Transformer heating up and huming sound is

This could be caused by one of the following.

You may have a diode that is breaking down causing a higher than normal draw on the transformer. You can test the diode with a good ohmmeter, you should get close to 0 resistance one direction and very high resistance the other.

Either the secondary winding or the filament winding on the transformer is partially shorted. If this is the case it will burn out fairly soon. To check use the ohmmeter again to get a good reading on the secondary and filament windings, compare these to the technical data on the unit.

May 04, 2010 | Microwave Ovens

2 Answers

No power to thermostat

You need a serviceman. No really, you do! You are in over your head and you are replacing parts just because you can see them and they are not the likely culprit. I am betting it is the contacters in your condensing unit.

Sep 01, 2009 | Heating & Cooling

1 Answer

Sony CDX-C70 CD Player Problem

Problem is in transformer on the primari or secondary or both side is short wireing. You should chang the transformer with the same type.

Jul 28, 2008 | Sony CDX-C7000X CD Player

1 Answer

It wont turn on

If nothing will come on check the breaker to the indoor section, check that the service switch by the in door section is on and the blower door cover is tightly closed. If all these junctions are transmitting power then it may be a burned out transformer. If you can check for 120v on the primary coil of the transformer and 24v on the secondary that would tell you where the problem is. If theres no voltage on either side then backtrack from the transformer on the 120v side till you find 120v. If theres 120v but no 24v your transformer secondary is burned out. If theres both then the problem is downstream from the transformer: circuit board 3amp fuse, loose wiring.

Jul 17, 2008 | Ruud Matching Split Air Conditioner

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