In this video, Josh goes to a No Heat Service Call, where 2 of the 3 systems have stopped heating! Watch through to the end to see several tips and tricks on diagnosing furnaces correctly and efficiently! Also learn a really cool trick to verify a gas valve is working properly, even when the board isn't. Thanks again to the sponsor of this video, FieldPulse !! Check ''em out using the link👇🏻 https://www.fieldpulse.com?lmref=i7nplg Join this channel to get access to perks: / @hvactechtips