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On the primary side we have 208 1ph in the building the unit quit running when i got inside the unit the transformer was fryed. replaced old transformer and hooked the new to the orange lead which is 240 but it to burned up there is also oil leaking from the capacitor.

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Replace the fuse in the plug.

Posted on May 27, 2009

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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.
Shastalaker7
A/C, & Heating Contractor.
PS, If you need my help contact me.

Feb 17, 2011 | Amana Heating & Cooling

1 Answer

I am trying to replace the transformer in a intertherm electric furnace . I wound up with a jard model 7541c . I know that i need to use the black and white wires for 120 but the old transformer had black...


The important thing to remember is that a transformer has two sides, a primary and secondary side. The primary side should have the 120 volt wires connected to it. It doesn't matter which one of the 120 vac wires goes to what terminal on this side as long as they are both on the primary side. Same with the other two wires, they go to the two wires on the secondary side of the transformer. Hope this helps! Jim

Jan 29, 2011 | Intertherm Heating & Cooling

1 Answer

I have a coleman Evcon model AH16-0 . I am


Typical Thermostat Wiring for 4 or 5 wire Heat/Cool Thermostat (not heat pumps)
4 Wire Termostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
with one transformer for both units
Rc One Side of 24 volt Transformer
Rh Jumper Rc to Rh
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
With 2 transformers one for indoor unit
And one for outdoor unit
Rc = Red One Side of (outside) 24 volt (outside transformer)
G = Green Blower (outside transformer)
Y = Yellow Cool (outside transformer)
Rh = Blue One side of (inside) 24 volt (inside transformer)
W = White Heat (inside transformer)
COOLING ONLY Thermostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
HEATING ONLY
R or Rh One Side of 24 volt Transformer
W = White Heat

Jan 06, 2010 | Heating & Cooling

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

2 Answers

Incorrect voltage input


Check the fuse. Otherwise there's another fuse at the low voltage transformer itself. it will be covered with plastic tape on the primary winding of the transformer. Just replace it and enjoy your music

Good luck

Jun 23, 2009 | Sony (109480) Computer Speakers

1 Answer

VMOC205SS quit heating, it runs but does not heat? What part do I need?


the heating components of a microwave r the diode, magnetron, and transformer. checking a unit plugged in can be dangerous seeing there is about 5000 volts from the step up transformer. if you have a amp probe you can check the amps at the wires powering the transformer. if you have less than 12 amps, and 110 volts at primary side of transformer change the magnetron and diode

May 18, 2009 | Viking VMOC205SS Microwave Oven

1 Answer

Fried transformer in air handler above board no #'s or voltage specs


What you need is a 24 volt transformer that has a rating of at least 40VA. 120 volts is the primary and 24 volts is the secondary voltage. You should try to figure out why the transformer burnt out first.

Paolo

May 05, 2009 | Heating & Cooling

1 Answer

I need a power transformer for roland sde -3000


If your transformer is fried then you will have to replace it of course, but if it has only opened the thermal fuse that is tucked into the primary windings then you can replace that and not have to replace the entire transformer. Be sure to use the same temperature and type thermal fuse as the original. You will find the thermal fuse tucked in where the ac power in wires go into the transformer and you may have to clear some plastic out of the way in order to get to it. Be very very carfull that you do not nick or cut or break any of the magnet wire that makes up the windings of the transformer. Good luck.

Nov 13, 2008 | Roland Audio Players & Recorders

1 Answer

Power surges


Does it attempt to startup at all? Do you get any lights or any indication that the unit is trying to start? If not, there should be a small transformer inside that is the standby transformer. It generates the 5V standby voltage. I have seen these go open in the primary since there is a fuse built into the transformer. You may need to replace this transformer. You should be able to get to the primary winding. With the unit unplugged, measure across the primary side with an ohmmeter. You should read a low value. If it reads infinity, the primary is open and you need to replace the transformer.

Dan

Aug 07, 2008 | JVC RX-517V Receiver

1 Answer

No control power


PRIMARY means INPUT(from supply side)
SECONDARY means output( to load side)

Sep 23, 2007 | Maytag M6D24E7A Air Conditioner

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