Manual here http://www.mcmelectronics.com/content/ProductData/Manuals/94-410.pdfTips http://www.mmccs.com/mmarc/n0ss/hakko_808_notes.pdf The manual says the heater should measure 40-50 ohms on the 120v model and 210-270 on 240v models. If that looks good I'd check the temp control pot. From: Bill Sudbrink <wh.sudbrink@verizon.net> To: 'Technical Tools Mail List' <techtoolslist@flippers.com> Sent: Thursday, April 2, 2015 9:41 PM Subject: [Techtoolslist] Maybe OT: Hakko 808 Hi, I know this is not exactly on topic but I suspect that a lot of list members here have a Hakko 808 desoldering tool. I plugged mine in today and it stayed cold. The pump works fine, so I know it has power. The heater seems to be in good shape so I suspect the circuit board that supplies current to the heater. I've tried measuring the voltage on the red wires that supply the heater, both AC and DC and there doesn't seem to be much there. Does anyone here know (or could check) what the voltage on the red wires should be? Or maybe the heater is bad and the board doesn't provide any current if it is open (or short). A value for the resistance across the heater would be good to know too. Has anybody here had a similar experience and knows a quick easy fix? Thanks, Bill Sudbrink _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/