Lennox EL195UH080NE48C Error Codes

Updated October 13, 2026 · by Aurora Star Tech Inc.

Lennox EL195UH080NE48C error codes and diagnostic codes. The EL195UH080NE48C is a Lennox furnace in the Lennox EL195UHNE series.

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Lennox EL195UH080NE48C error codes list

Code	Meaning	Severity
--	Double dashes - zone sensor problem	Medium
1 flash	Line voltage polarity reversed	Medium
2 flashes	Improper earth ground	Medium
3 flashes	Burner failed to light or lost flame	High
4 flashes	Low flame signal	Medium
5 flashes	Watchguard - ignition retries/recycles exceeded	High
7 flashes	Primary or secondary limit open	High
8 flashes	Rollout switch open	Critical
9 flashes	Pressure switch stays open or drops out on a heat call	High
10	Unknown device detected	High
10 flashes	Watchguard - pressure switch opened 5 times in one heat demand	High
11	Missing device	High
11 flashes	Pressure switch stuck closed before inducer starts	Medium
12	Indoor unit not detected	High
12 flashes	Flame sensed with gas valve off	Critical
13	Duplicate comfort sensor ID	High
13 flashes	Low line voltage	Medium
14	Too many devices of the same type	High
15	Parameter mismatch detected	Low
20	Protocol upgrade required	High
21	Incompatible equipment detected	High
29	Over temperature protection (indoor above 90 F)	High
30	Low temperature protection (below 40 F)	High
31	Lost communication with device	High
32	Device resetting	Low
34	Must program unit capacity for device	High
35	Incorrect operation of device	High
36	Heating when not requested	High
37	Cooling when not requested	High
38	Not heating when requested	High
39	No cooling when requested	High
40	HP heating lockout	Low
41	Device control board replaced	Low
500	PureAir differential pressure sensor fault	Medium
501	PureAir UV sensor fault	Medium
502	PureAir UV lamp off	Medium
503	PureAir filter life at 10%	Medium
504	PureAir filter life at 0%	Medium
505	PureAir model selection changed	Medium
506	PureAir lamp at 0% life	Medium
507	PureAir filter calibration failure	Medium
530	Zoning low damper 24 VAC	Medium
532	Zoning pressure switch opened (high pressure)	Low
542	Zone 1 temperature sensor fault	Medium
543	Zone 2 temperature sensor fault	Medium
544	Zone 3 temperature sensor fault	Medium
545	Zone 4 temperature sensor fault	Medium
546	Zone sensor parameters reset after power restore	Medium
547	Zone sensor parameters reset from system interruption	Medium
548	Zone humidity sensor error	Medium
551	Zone sensor lost communication	Medium
610	Low room temperature detected	High
700	Thermostat temperature sensor problem	High
701	Thermostat temperature above limit	High
703	Thermostat humidity sensor problem	Medium
3000	Replace filter 1	Low
3001	Replace filter 2	Low
3002	Replace humidifier pad	Low
3003	Replace UV bulb	Low
3004	Maintenance reminder	Low
3005	PureAir maintenance	Low
65537	Missing base (smart hub)	High
65538	Missing base	Low
65539	Thermostat lost connection or internal fault	High
65540	Missing HD wall display	Low
65541	Firmware download failed	Low
65542	Firmware update failed	Low
65543	Firmware updated	Low
65544	More than 8 thermostats in a group	Low
70001	IAQ internal sensor fault	Medium
70002	IAQ internal data fault	Medium
70003	IAQ side switch in OFF position	High
70004	Replace Smart IAQ monitor	Medium
70501	Smart room sensor internal data fault	Medium
70502	Smart room sensor internal fault	Medium
70503	Smart room sensor low battery	Low
70504	Smart room sensor battery 1%	Low
71001	Wireless extender internal data fault	Medium
71511	Duct or filter blockage	Medium
71517	Indoor fan motor failure	High
80001	IAQ persistent poor air quality	Low
80002	Unresponsive wireless device fault	Low
80003	Lost communication with wireless device	Medium
80005	Unknown wireless device found	Medium
E130	Configuration jumper missing	High
E132	Device control software fault	High
E344	IFC relay Y1 stuck	High
E380	EIM interlock relay fault	High
E381	EIM interlock relay stuck	High
E382	EIM relay W1 fault	High
Red LED off	No power to control or board fault	High
Red LED on steady	Board fault detected (107163-01)	High

Troubleshooting the EL195UH080NE48C

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Lennox EL195UH080NE48C specs and setup data

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General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

Lennox EL195UH080NE48C error codes list

Troubleshooting the EL195UH080NE48C

Lennox EL195UH080NE48C specs and setup data

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