Lennox Hearth EN04-VDLE, MN04-VDLE, MP53-VDLE, MP54-VDLE Symptom Possible Causes Corrective Action

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TROUBLESHOOTING THE Millivolt GAS CONTROL SYSTEM

Note: Before troubleshooting the gas control system, be sure external gas shut off valve (located at gas supply inlet) is in the “ON” position.

Important: Valve system troubleshooting should only be accomplished by a qualified service technician.

 

SYMPTOM

POSSIBLE CAUSES

CORRECTIVE ACTION

 

 

 

 

1.

Spark ignitor will not light

A. Defective ignitor

Check for spark at electrode and pilot; if no spark and electrode

 

pilot after repeated triggering

(no spark at electrode).

wire is properly connected, replace ignitor.

 

of ignitor button.

 

 

 

B. Defective or misaligned electrode

Using a match, light pilot. If pilot lights, turn off pilot and trig-

 

 

 

 

at pilot (spark at electrode).

ger the ignitor button again. If pilot lights, an improper gas

 

 

 

mixture caused the bad lighting and a longer purge period is

 

 

 

recommended. If pilot will not light – check gap at electrode and

 

 

 

pilot – should be 1/8" to have a strong spark. If gap measures

 

 

 

1/8", replace pilot (Figure 9 on page 8 ).

 

 

 

 

 

 

C. Gas supply pressure errant.

Check inlet gas pressure. It should be within the limits as

 

 

 

marked on the rating plate.

 

 

 

 

 

 

D. Pilot orifice plugged.

Clean or replace pilot orifice.

 

 

 

 

2.

Pilot will not stay lit after

A. Defective pilot generator

Check pilot flame, it must impinge on thermocouple (Figure

 

carefully following the light-

(thermocouple).

9 on page 8) Clean and/or adjust pilot for maximum flame

 

ing instructions.

 

impingement on thermocouple. Ensure that the connection

 

 

 

between the valve and thermocouple are tight and secure.

 

 

 

 

3.

Pilot burning, no gas to

A. Wall switch or wires defective.

Check wall switch and wires for proper connections. Jumper

 

burner, Valve knob “ON,”

 

wire across terminals at wall switch, if burner comes on, re-

 

Wall Switch “ON.”

 

place defective wall switch. If okay, jumper wires across wall

 

 

 

switch wires at valve, if burner comes on, wires are faulty or

 

 

 

connections are bad.

 

 

 

 

 

 

B. Thermopile may not be generating

Check thermopile with millivolt meter. Take reading at thermo-

 

 

sufficient millivoltage.

pile terminals of gas valve. Should read 325 millivolts minimum

 

 

 

with optional wall switch “OFF.” Replace faulty thermopile if

 

 

 

reading is below specified minimum.

 

 

 

 

 

 

C. Plugged burner orifice.

Check burner orifice for stoppage and remove.

 

 

 

 

 

 

 

4.

Frequent pilot/burner outage

A. Pilot flame may be too low or

Clean and/or adjust pilot flame for maximum flame impinge-

 

problem.

blowing (high) causing the pilot/

ment on thermocouple (Figure 9 on page 8 ).

 

 

valve safety to drop out.

 

 

 

 

 

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Contents Direct Vent Elite Series Table of Contents Operation and care of your appliance AdjustmentBurn-in Period Maintenance Glass CleaningSIT Millivolt Gas Valve Maintenance Task Accomplishing Person Procedure Maintenance ScheduleAttempt to clean glass while hoT Burner Adjustments Front Glass Enclosure Panel, Removal and InstallationFlame Appearance and Sooting Log Placement 11.1Accessory Components Standard Remote Control SystemDeluxe Remote Control System Forced Air KitON/OFF Wall Switch Kit Bag of Glowing EmbersTwelve Piece Ember Kit Horizontal Termination Shroud KitScreen Panel Kits Model No. Catalog No Dual Arch Screen KitsWarranty Replacement parts Product reference informationLennox Hearth Products West Taft AvenueFor Your Safety Read Before Lighting Lighting Instructions Millivolt GAS ValveLighting Instructions To Turn OFF GAS to ApplianceInstructions Dallumage Instructions D’ALLUMAGE Vanne GAZ MillivoltPour Fermer LE GAZ QUI Alimente L’APPAREIL What to do if YOU Smell GAS Lighting Instructions ElectronicTo shut off Instructions D’ALLUMAGE Instructions D’ALLUMAGE ElectronicPour Éteindre L’APPAREIL Symptom Possible Causes Corrective Action Symptom Possible causes Corrective action Nothing happens when Low voltage/or bad leadCheck wire connection Batteries LowReplacement Parts List SIT MillivoltDescription ELDV35 ELDV40 ELDV45 DescriptionReplacement Parts 875,030M REV. B 05/2008

EN53-VDLE, MN53-VDLE, MN54-VDLE, MP04-VDLE, MP53-VDLE specifications

The Lennox Hearth series, featuring models MN53-VDLE, EN04-VDLE, MN54-VDLE, EN53-VDLE, and MP04-VDLE, represents a remarkable blend of cutting-edge technology and elegant design, making them popular choices for homeowners looking to enhance their living spaces with reliable and stylish heating solutions.

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