I am replacing a Honeywell STB controller board with a Here is a link to the wiring diagram,refer to page 3 follow each wire of 6.
Looking at the ladder diagram, it looks like the blue (MED) wire was connected to the HEAT terminal, and the black (HI) wire is connected to the. Looking at the ladder diagram, it looks like the blue (MED) wire was connected to the HEAT terminal, and the black (HI) wire is connected to the.
Refer to Fig. 7 for schematic of provided.
ST wiring adapter. Setting Adjustable Heat Fan DIP Switches.
Set the heat fan-on delay and cool fan-on delay DIP. STB STB It's designed to replace all the Honeywell part #s listed below.
Repair Difficulty Level All parts are inspected for signs of.Nov 01, · Honeywell STU Universal Control Board Description: Universal Electronic Fan Timer with adjustable heat fan on, heat fan off, cool fan on, and cool fan off. Looking at the ladder diagram, it looks like the blue (MED) wire was connected to the HEAT terminal, and the black (HI) wire is connected to the COOL terminal. If you've run the tests described above, and found that the COOL terminal is energized when the jumpers are in place.
Trying to replace original Honeywell STB with STU Thought I had the wiring hooked up right but when I turn it on the blower turns on but the furnace does not ignite. Also on the circuit board the LED flashes so I know something isnt right. the ST wiring adapter.
3. Plug the 6-pin connector found on the ST wir-ing adapter directly to the open 6-pin connector on the new STU control board.
4. Take the two remaining white wires on the ST wiring adapter and connect to Neutral quick connect terminals 3 and 4 on the STU 5.
Take the black wire on the ST wiring adapter. This shopping feature will continue to load items.
In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading.5/5(6).hvac - Troubleshoot AC issue, no inside blower - Home Improvement Stack ExchangeHoneywell STU electronic fan timer -
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