Furnace control board failure preventing high fan speed; indoor coil freeze
furnace control board
$1,300
Source-linkedVerify source — Reddit postReddit post by u/Intrepid-Nothing226 (r/hvacadvice). After indoor coil/lines froze, installer diagnosed failed control board on an older Carrier 92 Comfort furnace (system installed 2024) that would not run the fan on high. Quoted trip + temporary fix and about to replace the board.
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Furnace control board failure preventing high fan speed; indoor coil freeze
furnace control board
$1,300
Months until failure
Not stated
Repair cost
$1,300
Repaired
No
Manufacturer warranty
Not stated
Extended warranty
Not stated
Support helpful
Not stated
Would recommend
Not stated
Confidence
88%
