On the thermocouple what is the 2 wires that are connected to it and are they necessary for operation

Michelle, That means the thermocouple is probably bad.

How to Replace Water Heaters Thermocouple

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiIzcaHquzKAhWhvoMKHX5gCuQQyCkIHTAA&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DjDvo4yJ1OdE&usg=AFQjCNHuKU9nETvft6qM92bu0PfqzLZTBw

It is more then likely your thermocouple / spark electrode.
ArctiCold Refrigeration We keep it cold

1. Signal Integrity
   • One benefit of using a terminal strip to connect the thermocouple wires is signal integrity. Since the thermocouple has a temperature probe located on the end of the wires, a signal must be sent from the probe to the thermocouple. The equipment and machinery will work intermittently, if the signal strength is not maintained. For example, if the probe senses the flame on the furnace, it sends a signal to the thermocouple. Once the flame goes out, a signal is sent to the thermocouple, which shuts off the gas.
     
   Shield
   • The terminal strips have a covering, or shield, to protect the thermocouple wires. You can open the strip and gain access to two metals for testing. You must cut off the insulation surrounding each metal wire and insert them into a terminal strip to make the proper connection. The cover protects those bare wires from dirt and debris. The cover can be removed when troubleshooting the thermocouple and wiring. Without the terminal strip, you would have to cut off each wire's insulation to test the signal strength and voltage between the probe and the thermocouple.
     
2. Transmitter
   • A thermocouple sensor that has to carry signals over a long distance requires a thermocouple transmitter to strengthen the signal. Using terminal strips makes it easier to connect a transmitter to the thermocouple device. The terminal strips also lengthen the thermocouple wires. If you need to extend the distance from the probe to the thermocouple, you can add additional wires and splice them with terminal strips to increase the distance. It is like adding an extension cord to an outlet, so you can extend the distance between the outlet and the television.
     
   Connection
   • Another benefit of using a terminal strip is that the strip enables a better electrical connection between the two thermocouple wires. Without a terminal strip, you would have to introduce signal compensation metals for the thermocouple sensor to get an accurate temperature reading between the two metals. Since the terminal strip uses the same metals found in the thermocouple wires, your electrical connection will not lose voltage. A decrease in voltage can trip the thermocouple.
     

AUDIO Any diagnosis of the Audio system should begin with the use of the scan tool. For information on the use of the scan tool, refer to the appropriate Diagnostic Service information.
For complete circuit diagrams, refer to the appropriate wiring information.

AUDIO SYSTEM DIAGNOSIS

CONDITION

POSSIBLE CAUSES

CORRECTION

NO AUDIO AT ALL SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL 1. Amplifier fuse faulty, if equipped. 1. Check and replace fuses, if required. 2. Wiring to amplifier faulty, if equipped. 2. Verify radio on/off input to amplifier and verify battery and ground connections. Repair wiring as necessary. 3. Radio faulty. 3. Refer to appropriate Diagnostic Service Manual. 4. Amplifier faulty, if equipped. 4. Replace amplifier. NO AUDIO AT SOME SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL 1. Wiring faulty between amplifier and speaker. 1. Repair wiring as necessary. 2. Wiring faulty between radio and amplifier. 2. Refer to speaker diagnostics. Repair wiring as necessary. 3. Wiring faulty between radio and speaker. 3. Check wiring for open or short, repair wiring as necessary. 4. Speaker(s) faulty. 4. Refer to speaker diagnostics. 5. Amplifier faulty.
5. Replace amplifier. 6. Radio faulty. 6. Refer to appropriate Diagnostic Service Manual. POOR AUDIO AT ALL SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL 1. Power/ground wiring to amplifier open or shorted. 1. Repair wiring as necessary. 2. Power/ground wiring open or shorted. 2. Repair wiring as necessary. 3. Amplifier faulty. 3. Replace amplifier. 4. Radio faulty. 4. Refer to appropriate Diagnostic Service Manual. POOR AUDIO AT SOME SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL 1. Wiring faulty between amplifier and speaker. 1. Repair wiring as necessary. 2. Wiring faulty between radio and amplifier. 2. Refer to speaker diagnostics. Repair wiring as necessary. 3. Wiring faulty between radio and speaker. 3. Check wiring for open or short, repair wiring as necessary. 4. Speakers faulty. 4. Refer to speaker diagnostics. 5. Amplifier faulty. 5. Replace amplifier. 6. Radio faulty. 6. Refer to appropriate Diagnostic Service Manual. SOUND DISTORTION (VIBRATION FROM SPEAKER AREA, BUZZING - HUMMING) 1. Door trim panel loose or missing fasteners. 1. Inspect door trim panel and correct as necessary. Replace any missing fasteners. 2. Water shield loose or misaligned. 2. Inspect water shield and adjust as required. 3. Items placed in door trim panel map pockets vibrating or moving from side to side. 3. Remove items from door trim panel. Ensure that vibration is no longer present. NO RADIO DISPLAY - AUDIO AND CONTROLS ARE OPERATIONAL 1. Radio faulty. 1. Refer to appropriate Diagnostic Service Manual. NO RADIO DISPLAY - AUDIO AND CONTROLS ARE NOT OPERATIONAL 1. Fuse faulty. 1. Check radio fuse and Ignition-Off Draw (IOD) fuse in Junction Block (JB). Replace fuses, if required. 2. Radio connector faulty. 2. Check for loose or corroded radio connector. Repair, if required. POOR RADIO RECEPTION WITH KEY IN ACCESSORY OR IGNITION ON POSITION 1. Antenna faulty. 1. Replace the antenna. 2. Radio ground faulty. 2. Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground, if required. 3. Radio noise suppression faulty. 3. Repair or replace ground strap as necessary. 4. Radio faulty. 4. Refer to appropriate Diagnostic Service Manual. 5. Faulty rear window defogger. 5. Verify that the rear defogger grid is functioning properly, repair as necessary (Refer to 08 - Electrical/Heated Glass - Diagnosis and Testing). NO COMPACT DISC OR DVD OPERATION 1. Faulty CD/DVD. 1. Insert known good CD/DVD and test operation. 2. Foreign material on CD/DVD. 2. Clean CD/DVD and test operation. 3. Condensation on CD/DVD or optics. 3. Allow temperature of vehicle interior to stabilize and test operation. 4. Faulty CD/DVD player. 4. Refer to appropriate Diagnostic Service Manual.

check for power from low volt side of transformer and at gas valve also check fan on other than auto.

Many times this problem is because the thermocouple has developed a bad seating connection between the thermocouple fixing nut and the Thermo-Electric valve located inside of your actual control valve assembly.

Meaning the connection between the end of the thermocouple wire just above the thermocouple fixing nut and the seat which is inside the Thermo-Electric valve have a bad connection that does now allows current to pass through the connection and into the Thermo-Electric valve.

When you have a good connection here it allows the control valve to stay open and allows gas to pass through the control valve into both the pilot and the main burner, but if this connection is bad then each time you release the button the pilot light will goes out.

Now to try and resolve this service problem with having to purchase new and sometimes expensive parts.

Remove the thermocouple wire from the gas control valve Thermo-Electric unit by turning fitting counter clockwise with a 5/16 wrench

Once the thermocouple fitting has been loosened and the thermocouple has been removed inspect the thermocouple Power Unit Connector Contact (PUCC).

Although the PUCC may appear clean may times the PUCC has developed a thin layer of corrosion that prevents the thermocouple from sending the needed current to the Thermo-Electric unit resulting in a pilot flame that may only remain burning strong as long as the pilot button is being pushed by the operator.

After removing the thermocouple PUCC from the valve you will need to clean both the power unit connector contact and the Thermo-Electric valve seat contact.

The connecting will require that a small amount of new "Clean Metal" be exposed providing a new fresh metal seat for the PUCC and the Thermo-Electric valve.

With a safety blade or a metal pick expose some new metal on both the PUCC and then up inside the Thermal-Electric valve seat scraping just a small amount of old surface from each item.
Now reassemble the thermocouple wire back into your gas control valve and tighten the nut firmly to achieve a good solid seating connection.

This new fresh metal seat should allow the millivolt current generated from the thermocouple to energize the Thermo-Electric valve and allow the gas control valve to remain in the open position.

If this does not work you may need to order a ned Pilot/ODS assembly.

You can find that at www.msservice.net or www.allpartsinc.com

Thank you:

The thermocouple is likely defective...(Copper wire heated by the pilot) or the pilot itself is too small or dirty....the pilot must be BLUE , not yellow like a candle...and it must envelop the top portion of the thermocouple....you could also have an auxiliary limit or ECO wired in series with the thermocouple circuit that could be open.....also make sure the thermocouple is inserted all the way and is in the pilot flame as mentioned above

C0046: Fusing Cooling Fan Motor /1’s failure to turn
Relevant Electrical Parts
Suction Fan Motor (M12) Control Board (PWB-MC)
Step Action
WIRING DIAGRAM
Control Signal
Location
(Electrical
Component)
1
Check the connector of motor for proper connection
and correct as necessary.
— —
2
Check the fan for possible overload and correct as
necessary.
— —
3
M12 operation check PWB-MC PJ18MC-9 (LOCK)
PWB-MC PJ18MC-7 (REM)
6-P
4 Change PWB-MC — —
Relevant Electrical Parts
Fusing Cooling Fan Motor/1 (M9) DC Power Supply (PU1)
Step Action
WIRING DIAGRAM
Control Signal
Location
(Electrical
Component)
1
Check the connector of motor for proper connection
and correct as necessary.
— —
2
Check the fan for possible overload and correct as
necessary.
— —
3 M9 operation check PU1 PJ17PU1-5 (LOCK) 2-K
4 Change PU-1 —

I'd go with the obvious.