My Weller WMRP soldering pencil has become intermitent, is ther any way to open and look for broken solderings in it?

Question edited for clarity.

Weller Tech Sheet WTCPR.pdf

University of California San Diego https://neurophysics.ucsd.edu > Manuals
Power Unit Size 4-7/16" x 7-3/8" x 3-5/8". Six (6) Foot, 3 Wire Power Cord. 4. *. SOLDERING PENCIL: Soldering Pencil Wattage 48 Watts. Tip Voltage To Ground ...
4 pages

Weller Tech Sheet

UserManual.wiki https://usermanual.wiki > Manual > WTCPRTec...
If magnastat switch checks good, check wiring for continuity. Re- fer to schematic. C. TC202/TC202D Power Unit Troubleshooting Guide. (No 24 VAC at Pin 1 ...

Vintage unit

https://www.google.com/search?q=Tc202+power+unit

..

that is what Google is for

There are normally three of the same type. They are consumable, you don't need to stock all the different types - just buy the one you need for your current project.

Note, these are high power and were commonly used for soldering wires in the point-to-point wiring used in old tube electronics. Do not use this on a Printed circuit board - it will damage any silicon component.

Use a a soldering pencil for printed circuit boards.

It's better to get a soldering station instead.

http://ptsunow.wordpress.com/2011/06/13/weller-bp860mp-removing-the-button/ I hope this helps

I had the same problem with mine. Try pushing or twisting the cord entering the soldering iron pencil. The temperature sensor can become disconnected if the cord gets twisted.

Make sure the tip is tightened fully, use a 5/16 wrench to snug it down.

That would be correct.

I suggest that you set the "Auto Time Off" much longer or turn it off by setting it to 0, and use a standby of 400 degrees after 10 minutes instead.

The reason is that every time this soldering iron has to turn on, it's trying to heat up in about 5-10 seconds. When it does that, it applies full wattage to the heating element, and putting full wattage on them a lot of times is what's burning them out. If the soldering iron maintains the same temperature while not soldering, it only uses 20-30% of the full wattage to keep it at the set temp. This isn't nearly as hard on the heating element.