Question about Fedders Y Chassis AEY12F7E Air Conditioner

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Failed heat function

All functions work properly except no current through heat coil. 120volts present on both sides of small transistor like component (240volts across this component) on heater coil, but this small component (not shown on wiring diagram) seems faulty. What is this small component for and can it be bypassed (excluded from circuit)?

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No its a thermal fuse you can by pass it for testing but run long witout it and may get fire other disc is thermal limiter which if it fails then thermal fuse blows i reccomend replacing both as thermal disc may be stuck in closed position

Posted on Mar 31, 2008

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Posted on Jan 02, 2017

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Mazda 3 2005 can't. not start starter ok , gas ok power to spark for coil


All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.



Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.


2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.


3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.

Mar 20, 2016 | Mazda Cars & Trucks

1 Answer

Replaced head gaskets and coil, truck ran fine for awhile then i parked it and it will not start


All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.



Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.


2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.


3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.

Mar 11, 2016 | 2000 Ford Ranger SuperCab

1 Answer

All lights come on except heater light coul it be tha i changed fro a large propane tant to a small tank


The heater is failing to fire for any number of reasons, not related to the gas. If the heater was functioning properly you would have gotten a "call for heat"; and the ignition device would have activated whether gas was present or not. The service light was telling the truth. Best to get a tech out there to see where the problem is.

Nov 20, 2013 | Pool & Spa

1 Answer

My 1993 dodge Dakota won't fire, I replaced ignition coil and the pickup coil and still won't fire?


All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.



Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.


2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.


3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.

Aug 17, 2013 | 1993 Dodge Dakota

1 Answer

Oven gas doesn't come ouy. Boiler works, ignitor


Ever though the ignitor glows it may still be bad. The gas valve circuit consists of the main oven control, the igniter and the valve coil. As a properly functioning ignitor heats up, it allows more current to flow through the circuit. It finally reaches the point where it opens the gas valve. A failing ignitor will not reach that point. The fact that it glows at all tells you the control contacts are closing and the gas valve coil is nt bad. ****If you try this repair, make sure to remove power from the unit. Be careful handling the ignitor as it is extremely fragile.

May 02, 2009 | Kitchen Ranges

2 Answers

Freezer is frosted in back Refrigerator is warm


The problem is the defrost system located behind the freezer back panel.

The defrost system (AKA evap. system) is composed by an heating coil, a fan , and a defrost thermostat, and its function is avoiding ice formation on coil.
When defrost system is defective the fridge wont cool down properly

In your fridge , either evaporator fan, thermostat or heating element is faulty, and the ice on coils is preventing the appliance from cooling down properly.

Mar 29, 2009 | Hotpoint HSS25GFP Side by Side...

2 Answers

1998 jeep cheeroke starter problem


Yes I believe that would fix the problem. It is under the hood mounted in the "power distribution box"


If this by slight chance doesn't work which I do think will work; Then you can try
The HEI system, used on 2.5L, 2.8L and 4.0L engines, is a pulse-triggered, transistorized controlled, inductive discharge ignition system. The entire HEI system (except for the ignition coil on fuel injected engines) is contained within the distributor cap.
The distributor, in addition to housing the mechanical and vacuum advance mechanisms, contains the electronic control module, and the magnetic triggering device. The magnetic pick-up assembly contains a permanent magnet, a pole piece with internal teeth, and a pick-up coil (not to be confused with the ignition coil).
In the HEI system, as in other electronic ignition systems, the breaker points have been replaced with an electronic switch-a transistor-which is located within the control module. This switching transistor performs the same function the points did in an conventional ignition system. It simply turns coil primary current on and off at the correct time. Essentially then, electronic and conventional ignition systems operate on the same principle.
The module which houses the switching transistor is controlled (turned on and off) by a magnetically generated impulse induced in the pick-up coil. When the teeth of the rotating timer align with the teeth of the pole piece, the induced voltage in the pick-up coil signals the electronic module to open the coil primary circuit. The primary current then decreases, and a high voltage is induced in the ignition coil secondary windings which is then directed through the rotor and high voltage leads (spark plug wires) to fire the spark plugs.
In essence then, the pick-up coil modu

Jan 20, 2009 | 1998 Jeep Cherokee

1 Answer

Monitor horizontal adjust no function


It is the problem of horizantal section.Check horizantan hold transistor that is placed on hitsink of eht and two small transistors near iton pcb.and check horizantal yoke coil pins for dry soldring or low voltages.If thats are ok then change hori. &ver. deflection ic.
Hope this solution works.i am always for you

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4 Answers

Cuisinart toaster oven modele no.TOB-30BWC, serial no.50421.


The contacts for these toasters fail. The plasic cam that depresses the contacts also can melt. The design is poor and no replacement parts are available. When selecting a setting, if the selection is not exactly perfect, the contacts arc and eventually fail. Unless cuisinart changes the selection cam to a solid state or relay, this failure will continue to happen during normal use. If your unit works properly do not switch the function setting while heating, this will cause the contacts to arc and erode the contact surface. This posting is applicable to the TOB-30BC, TOB-30BCC and probably all TOB-30XXX models.

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