Frigidaire Dryer Repair in Toronto — Not drying (clothes still damp)

• E4A is the signature not-drying code on these 27" vented Frigidaire/Affinity machines and it is NOT a part code — it is a 'program timeout' fault that simply means the cycle ran past its allowed time without the load reaching dry. Frigidaire's own diagnostic for E4A lists the exact things we check, in order: a restricted exhaust vent, a broken or loose blower fan blade, a moisture-sensor-bar circuit fault, the control thermistor's resistance, and even a dryer boxed in a closet with a solid door. So we treat E4A as a 'whole airflow + sensing loop' diagnosis, not a single-part swap — the machine heats and tumbles fine, it just never finishes, and the answer is almost always airflow or sensing, rarely the heater.
• The most common not-drying call has no code at all — it's a restricted vent. A lint-packed exhaust run or crushed transition hose strangles airflow, so hot, moist air can't leave the drum and the load finishes warm but damp (and the cycle drags). The tell is that the cabinet runs hot while the clothes stay wet. Untreated, the same restriction overheats the heater housing and trips the 3204267 high-limit thermostat (a ~260F cutout, replaces 508516), which then cuts heat mid-cycle and turns a slow-drying complaint into an intermittent no-heat one. We clear the full vent path FIRST on every not-drying call — metering or replacing the high-limit without clearing the duct just cooks the next one.
• A heats-and-tumbles-but-stays-damp load with no vent restriction is a thermistor story. The 134587700 control thermistor (replaces 1156925 / 134216500 / AP3866842) sits in the blower housing and reports drum-air temperature to the board; when it drifts it mis-meters the cycle and starves heat or ends early. We confirm by resistance, not guesswork — the OEM spec is roughly 50k ohms at room temperature (acceptably 47k–66k at ~68–77F), and a reading well outside that, or one that won't move as it warms, is a failed sensor. It's a ~$30–$60 part and a one-visit fix, and it's the part that explains E4A when the vent and blower both check out clean.
• Don't mistake the 'Ad' display for a fault on a not-drying call — on Frigidaire Auto-Dry models 'Ad' is the Auto-Dry sensing status, not an error. A load that ends early reading 'dry' with the clothes still damp is the moisture-sensing bars, the two metal strips at the back of the drum that read conductivity across wet fabric. Fabric-softener-sheet residue glazes those bars and fakes a 'dry' reading, so the cycle quits with a wet load. The fix costs nothing in parts: we wipe the sensor strips with rubbing alcohol and confirm the bar circuit's continuity before anyone touches the thermistor or heater. This is the classic 'it says done but the clothes are wet' call.
• A weak-airflow not-drying call with no vent restriction points at the blower wheel & housing assembly (131775600; cross-references AP2107606 / 131775610 / 823074 / PS418726). The plastic wheel rides on the drive-motor shaft; over time the splines strip off the shaft so the wheel free-spins without moving air, or the wheel cracks/splits and goes out of balance — either way airflow through the drum collapses and the load finishes damp (often with a groan or rattle as the giveaway). Field test: pull the exhaust and feel the discharge — weak flow with a clear vent, plus a wheel that wobbles or won't drive when you turn it by hand, condemns 131775600. We replace the wheel-and-housing as the assembly rather than chase a stripped sleeve alone, and we confirm the right assembly against the model's parts diagram first since other Frigidaire drive platforms use a different blower housing (e.g. the 131967600 assembly on a different model group).
• Heat that's present but never enough — the load dries eventually but takes two or three cycles — can be a partially-open thermal path masquerading as 'just slow.' On this platform the 137032600 inlet thermal limiter is a one-shot fuse that blows fully on an overheat, but a marginal high-limit (3204267) that opens early under load chokes the heat intermittently, so the drum tumbles with only intermittent warmth and nothing ever dries. Because both of those parts trip on restricted airflow, we meter the thermal stack cold AND clear the vent/lint path together — replacing a tripped limiter without fixing the airflow that opened it just sends the customer back to a slow-drying machine next week.
• Sheer overloading and 'closet with a solid door' installs are the non-part not-drying calls Frigidaire's E4A notes call out by name, and in Toronto they're common. A drum stuffed past capacity can't tumble the load through the heated airstream, and a dryer sealed in an unvented closet recirculates its own moist exhaust — both finish damp with no failed part at all. We show the owner the load-size and make-up-air points (louvred door or vent) once; it's the cheapest 'repair' on the list and it stops the repeat call without selling a part that wasn't broken.

Frigidaire not drying (clothes still damp) in Toronto — the local specifics

• The recurring Frigidaire not-drying pattern we see across Toronto is 'heats and tumbles but clothes come out damp' on the 27" vented Affinity/Gallery platform — and the root cause clusters on airflow and sensing far more than on the heater. The repeat offenders are a lint-restricted condo/stacked vent run, fabric-softener-glazed moisture-sensor bars faking an early 'dry,' and a drifted 134587700 thermistor mis-metering the cycle, frequently surfacing as an E4A timeout. We routinely find the high-limit (3204267) tripped as a downstream symptom of the blocked vent rather than as the primary fault.
• To a Toronto not-drying call we bring the 134587700 control thermistor, the 3204267 high-limit thermostat and the 137032600 thermal limiter, plus rubbing alcohol and contact-clean for the moisture-sensor bars and the tools to clear and re-seat the exhaust/transition vent on the spot. If the blower side is implicated we confirm the 131775600 wheel-and-housing against the model diagram and bring it next-day — but the carry kit closes the large majority of these calls same-visit.

For the full Frigidaire dryer module — every fault, part number and code — see Frigidaire dryer repair in Toronto, and for the same fault across all brands the dryer not drying (clothes still damp) guide.