WELL that has been rectified and I have the appropriate boards.. only to find that maybe I crossed some wires, because I have it all hooked up now.. and it keeps popping the plug where I am testing it (gfi from a bathroom with a heavy extension cord).. but only after a few seconds of hitting control panel buttons. You can also bypass the furnace control board with a heavy-duty extension cord as I describe here. This DIY repair guide explains how to replace the electronic control board in a window air conditioner. Why would it blow a fuse? I have the thermostat wired and a relay to turn power on and off to the AC unit. Help please Terry 0 0 1. I don't plan on lagering but I use a thermowell on my beers to control temperature of the liquid rather than ambient. Air Conditioning and Cooling Systems - Bypass Fan Control Board - Can anyone please tell me how to unbypass this Honeywell st9101a 1014 Fan control board? An AC tech bypassed the circuit to make the Bypass Fan Control Board - DoItYourself.com Community Forums You could bypass the control panel altogether, add on relay that turns on the compressor and fan at the same time. The AC tech came out and said it was my defrost board and that he could bypass it (with our permission) until he got a replacement. So I could see this thing shutting off at ambient 60/65 being a bad thing. He did, and we had cold air. Can you bypass circuit board in your air conditioner? Hoping someone can help me with bypassing thermostat so the AC unit won't shut off. Answer. AC Broke, took it to a mechanic. RE: How do I bypass a fan relay circuit board on an AC air handler? A bypass capacitor is often used to decouple a subcircuit from AC signals or voltage spikes on a power supply or other line. How did he bypass the control board to start the AC. Yesterday, we again had a close lightning strike and my AC is showing the exact same signs. Keeps blowing a fuse in the cooling assembly? He had it running by bypassing the control board (I believe). Top Answer. My AC is not blowing air it seems because the control board is fried, the board has a fan relay which has 3 connectors, "SPT", "NO", and "NC", is there anyway to make the fan work by putting together any of the cables that connect to the relay, like the NO and the … I have a window unit air conditioner (Panasonic CWXC103HU) that I am connecting to a standard 24v central thermostat. 2012-07-31 00:53:42 2012-07-31 00:53:42. Wiki User Answered . The new board came in and he swapped boards and everything was fine. Problem is that this unit has a panel of control buttons on the front...one of which is on/off. Air Conditioning and Cooling Systems - Bypass Fan control Board (un-bypass) - There is an exact/similar post about this almost 5yrs ago, so I hope someone can also help me. 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