Susan Brown

[Susan Brown]

(I moved your reply to your original topic)

Here’s the original problem statement:

When you walk up to the range you find that the left-front hot surface indicator light is on even though the surface is cold. That’s pretty much all the verification you need, but you go ahead and turn each burner on momentarily until the indicator lights come on, then turn them off. Sure enough, the left-front element’s light remains on while all the other ones turn off once their respective element cools down.

So, the LOI is one of the 4 lights that are each connected with a burner – the one for the LF burner.

There is also a single hot surface light that apparently comes on when the glass surface is above 150 degrees (according to the info on page 1 of the manual that we gave you) but is not connected to any particular burner.

[Susan Brown]

See if this Forum thread helps you:

https://my.mastersamuraitech.com/appliance-repair-course-support/student-forums/topic/cs7/

[Susan Brown]

The second link I gave you mentions doing that.

[Susan Brown]

For the quiz question, we tell you that you’re measuring voltage across the switch. This means you are able to get the measurement without any other loads being in between your two meter probes. Just go with that simple scenario to determine the answer.

In real life, you may or may not have “EEPs” available for particular components, but that’s a separate consideration.

This question is making sure you understand what a voltage reading is telling you. Reading source voltage across a switch means that the switch is open.

[Susan Brown]

Right. When a switch is closed, will you have a voltage difference across it?

[Susan Brown]

You can create a cheater cord – described here:

https://appliantology.org/blogs/entry/669-rigging-and-using-a-compressor-test-cord-to-manually-operate-a-compressor/

But watch this. Easier to have a generic start device for testing.

https://appliantology.org/topic/64098-mst-office-hours-8212017-split-phase-compressors-and-ptc-start-devices/

[Susan Brown]

Which module/unit is this from?

[Susan Brown]

Is a hi-limit a switch or a load?

[Susan Brown]

It’s best to think of a load having a specific fault, and not just “bad”. It will help your thinking. Look at the schematic again. If the drain pump fails open, then neutral will not be fed through the drain pump, as shown in the video (about halfway through). In that event, the two measurement points will be at the same electrical potential.

[Susan Brown]

We’re happy to help, but please answer the question I sent you via email first

[Susan Brown]

We’re happy to help, but please answer the question I sent you via email first

[Susan Brown]

We’re happy to help, but please answer the question I sent you via email first

[Susan Brown]

You should also watch this webinar at Appliantology:

https://appliantology.org/topic/72423-voltage-voltage-drop-loads-switches-jumpers-cheaters/

[Susan Brown]

An excerpt from Module 3, Unit 8:

Voltage is most simply described as the force that pushes electrons along in a circuit (the actual movement of those electrons being what we call current). Voltage is the prime mover or cause in a circuit. Everything else that happens in the circuit is an effect. When there is a difference in voltage between two points in a complete circuit, then electrons will move: they will be pushed away by the more negative voltage and be sucked in by the more positive voltage, a push-pull kind of a deal. The directed movement of electrons from that difference in voltage between two points is called current.

Voltage Drop, on the other hand, is an effect caused by electrons being forced through the resistance of a load by that voltage difference between two points.

This concept about Voltage Drop is key, so we’ll state it one more time: A Voltage Drop across a load is produced when current flows through that load.

When we talk about Voltage Drop, we’re always talking about a specific load that has current flowing thorough it. That’s why it makes no sense to talk about the Voltage Drop at a wall outlet that we’re checking with our meter, for example, because there’s no current flow and no load (the meter doesn’t count as a load– a good meter should never load the circuit enough to make a difference).

If you have an open anywhere in the circuit, this means current won’t be flowing and you won’t measure a voltage drop across any of the loads in that circuit. You may be able to do voltage measurements wrt N to determine if the open is on the Line side or Neutral.

[Susan Brown]

This is a switch, not a load. Loads do have line on one side and neutral on the other (assuming a 120vac power supply). That’s not the case for switches.

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