@Phaedrux After connecting as you mention and issuing M552 S1 it says Printer is not online.
I now have it working after refreshing the firmware a second time.
Thanks for reaching out.
All good for now!

@Phaedrux Just as follow up for anyone following this thread. Most all of the issues have been corrected with your excellent and quick assistance.
The only thing I still really don't like is even when changing the M950 Q100 down to Q10 the SSR still is fluctuating on and off multiple times a second with giving a scientific answer. I was hoping to see it operating on and off more like every 3 to 5 seconds.

@Phaedrux said in M140 Heater Fault Error:

@pete1961 said in M140 Heater Fault Error:

So this is in place of M307 is that correct?

No. It is in addition to M307.

Got it!
Let me try it!
Does it come in after M307 or before?

@dc42
Thanks for the feedback.
It is a cheap Fotec but was purchased from Amazon.
So I know they are all considered junk.
I just recently purchased an Auber Relay knowing this after these other cheap Chinese ones keep melting! They have done so multiple times over the last few years.
Knowing that I will use M950. So this is in place of M307 is that correct?

@droftarts
Can you explain how or where to adjust "Q".
I don't see it as a parameter for M307.
The SSR is rated for 80 amps.

@Phaedrux
I replaced the thermistor which solved the erroneous temperature readings.
I did a PID Tune and it went fine and appeared like everything was in order.
During the printing of the first part after tuning my 80AMP SSD Relay overheated, melted and self destructed. This is not the first time this has happened either.
I have the relay being controlled from the Duet2wifi Heater Output and power for the bed being supplied from a 12VDC Power Supply.
What would cause these relays to fail? What is the remedy to avoid this from happening?

@Phaedrux
Okay just ran a PID Calibration on the Bed afterwards when trying to print received error stating bed was taking to long to heat up.

After running the bed calibration my M307 is H0 R0.582 K0.393:0.000 D14.47 E1.35 S1.00 B0

The OLD M307 before that was know to work was M307 H0 R0 .554 C309.6 D11.90 S1.00 B1 V11.8

Also I now believe the thermistor does read correctly after checking it again.

So I'm not sure why the printer is slow to heat up. Any ideas?

@Phaedrux I do still have them from before but they are old and use different commands because the firmware was quite old.

@jay_s_uk
Measuring the Bed Temp with a FLuke IR Thermometer.
It has always been accurate.
The thermistor is directly in the center of a 12" X12" heated bed made from a PCB board.
It essentially worked until I upgraded the firmware and re-did my setup from scratch using the config tool.
So I'm of the belief it is related to a setting in my config file and not hardware related as everything was working correctly previously.

@jay_s_uk
During bed heater tuning I noted the accurate temperature is far off.
When the Duet board thinks it's 90°C it's actually about 58°C.
What parameter needs to be changed to correct for this difference?

@chrishamm I can certainly do that.
I'm thinking you think the config file looks okay.
Is that correct?