Dri-Eaz LGR 3500i restoration dehumidifier (F411 / 110133): quick sheet

Covers: Dri-Eaz LGR 3500i low-grain refrigerant (LGR) portable dehumidifier used for water-damage drying (part number 110133, formerly F411). The LGR 2800i shares the owner's manual.

Single sourceBrands: Dri-Eaz2 components

A large rotomolded job-site dehumidifier with an internal condensate pump and a 40 ft hose, a digital panel with plain-English messages instead of codes, and (on current units) a Command Hub touchscreen with Bluetooth/Wi-Fi app control. Handyman and restoration calls: pump not emptying, filter clogged, low output in cold rooms, and power (11+ A on a shared circuit).

Safety first

Plug into a grounded GFCI-protected outlet on a wet job site.
It weighs about 158 lb; use two people or the handle/wheels on stairs.
Refrigerant system repairs are EPA 608 work for a certified technician.

How it works

LGR refrigeration: it keeps pulling moisture at lower humidity than a household unit, which is why restorers use it to dry structures.

Condensate is pumped out through a quick-connect port and a 40 ft hose to a drain, sink or outdoors.

Controls show plain-English system messages (not numeric codes), humidistat, job hours and maintenance reminders, and the unit restarts automatically after a power outage.

Uses a 4-PRO air filter; a clogged filter cuts water removal and can ice the coil.

Components & tests

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Close view of the louvered air outlet of a portable air conditioner by Curpharar, CC BY-SA 4.0

Diagnostic guides for this appliance

Guide · Dehumidifier

Dehumidifier error codes: general approach (sensor, bucket, pump)

Many portable dehumidifiers (TCL, Honeywell and similar platforms) use the same code groups: sensor faults (E1/E2/EH), bucket (P1/FL), pump (E5/P2) and refrigeration protection (E3/EC). Codes are not universal: on Frigidaire, E5/H3 is compressor overload, PU is the pump and EC/F0 is a sealed-system fault. Power-cycle and basic checks fix many; sensor faults need a part.

4 steps ~30 mineasy

Guide · Dehumidifier

Dehumidifier won't turn on (no display)

Check outlet, cord and any reset button first. Then internal fuse, transformer (on some whole-house units) and the control board.

4 steps ~45 minmoderate

Guide · Dehumidifier

Dehumidifier humidity reading wrong or runs nonstop

Compare against a known-good hygrometer. A dusty or failed humidity sensor, a set point too low for the space, or an undersized unit makes it run nonstop.

3 steps ~30 mineasy

Other dehumidifiers manuals

Manual · Dehumidifier

Hisense 35 / 50 / 70-pint dehumidifiers (DH-35K1SCLE to DH-70KP1SLE): quick sheet

Hisense portable dehumidifiers covered by one use and care guide: DH-35K1SCLE, DH-50K1SDLE, DH-70K1SLE, DH-50KD1SDLE and the pump models DH-50KP1SDLE and DH-70KP1SLE (KP = built-in pump), plus the similar DH50K1W, DH50KP1WG, DH70K1G and DH70KP1WG. No CPSC recall for Hisense-branded dehumidifiers was found (the big dehumidifier recalls were Gree, New Widetech and GD Midea units), but check the model against cpsc.gov.

5 components5 common failuresHisense

Manual · Dehumidifier

Danby DDR dehumidifiers (incl. recalled Gree-built and New Widetech-built units): quick sheet

Danby portable dehumidifiers with the DDR model prefix (Danby, Danby Premiere, Danby Designer, plus the Danby-made Generations GDR and ArcticAire ADR lines). Two recall groups matter on every call: the Gree-built units recalled in 2013 (DDR3011, DDR30P, DDR4511, DDR45P, DDR6511, DDR65CHP, all date codes, sold January 2005 - August 2013) and the New Widetech-built units recalled in 2021 (made before September 1, 2017, sold February 2009 - August 2017, e.g. DDR45A3GDB, DDR70A3GDB, DDR60RGDD, DDR25E, DDR30E, DDR45E, DDR5009REE, DDR6009REE, DDR7009REE, DDR50A1GP, DDR60A2GP, DDR70A1GP, GDR5011BL). Current models (e.g. DDR020BJWDB through DDR050BJWDB, DDR060BECWDB) are later builds.

5 components6 common failuresDanby, Danby Premiere, Danby Designer

Manual · Dehumidifier

Santa Fe Ultra series / Ultra-Aire 70H and 120H whole-house ventilating dehumidifiers (Ultra70, Ultra120): quick sheet

Ducted whole-house ventilating dehumidifiers from Therma-Stor (Madison, WI): the Ultra-Aire 70H (now sold as the Santa Fe Ultra70) and Ultra-Aire 120H (now the Santa Fe Ultra120). 2024-on Santa Fe Ultra units use R-454B; the older Ultra-Aire 120H manual lists R-410A. Other Ultra-Aire models (120V, 98H) exist and have different numbers.

4 components4 common failuresSanta Fe, Ultra-Aire, Therma-Stor