One fault, four code names
The source does not give these four codes separate meanings — it lists them as one entry. The exact sentence: "F22, F23, E1 and E2 are thermistor or temperature sensor faults on various platforms." Why one fault has four names is explained by the same page's opening: "Whirlpool dryer error codes are less standardised than the washer equivalents, because Whirlpool has used several different control platforms over the years. A code on a Cabrio does not necessarily mean the same thing on a Duet, and older mechanical dryers display no codes at all." So F22, F23, E1 and E2 are the same temperature fault surfacing under different names on different Whirlpool control platforms, not four separate parts.
What the fault actually is
The fault itself is stated in one place: "The sensor reports drum temperature to the control board, and when it reads out of range the board may refuse to run the heater at all." That is the practical symptom — a dryer that stops heating, or will not heat at all, because the board will not energize the heater on a temperature reading it cannot trust.
How the sensor is tested
A thermistor is not confirmed with a simple continuity check. The source: "A thermistor is tested by resistance against a temperature chart rather than simple continuity, so this usually needs service data for your model." That is why the same page stresses that "this is the brand where checking your own model number matters most" — confirming the sensor means looking up the resistance-versus-temperature figures for your exact model, not a meter reading anyone can take.
What the code will not tell you, and when to call
The page's general warning applies here: "Codes on these machines point at a circuit rather than a component." And on this fault specifically: "Thermistor faults, board codes and any heating circuit fault that persists after the vent has been cleared need testing under power." So a thermistor code that clears and stays gone after a breaker reset is fine to leave alone, but one that returns — or a dryer that still will not heat after the vent is clear — is a job for someone testing live voltage.
Non-official repair reference — this page is an independent summary of a technician's guide, not a Whirlpool service manual.
Source
Source: Denton Repair Services — Whirlpool Dryer Error Codes · Checked 2026-11-12.