Monessen Hearth DEB24

Questions and Answers

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Peter EvansAug 16, 2025
Why does my Monessen Hearth DEB24 Gas Heater produce unwanted odors?
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  Gerald BryantAug 16, 2025
  If your Monessen Hearth Gas Heater produces unwanted odors, it could be due to several reasons. It might be burning vapors from paint, hair spray, or glues; in this case, ventilate the room and avoid using odor-causing products while the heater is running. A gas leak could also be the source; locate and correct any leaks. Alternatively, it could be due to the initial burn-off; ventilate the room and turn the unit on high until the odor disappears, which should happen after about 6 hours of continuous use.
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Andrew LeAug 18, 2025
What to do if my Monessen Hearth Gas Heater shuts off during use?
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  Rebecca CollinsAug 18, 2025
  If your Monessen Hearth Gas Heater shuts off during use, it may be due to several reasons. Insufficient fresh air for the ODS/pilot operation can cause this; try opening a window or door for ventilation. Low line pressure could also be the cause; contact your local gas company to check this. A partially clogged ODS/pilot can also lead to shutdowns; try cleaning the ODS/pilot. A defective thermopile may also be responsible, so check the wire connections and ensure the output is 500 mV across the TH/TP and TP terminals when the ON/OFF switches are off. Restrictions in incoming airflow, such as a bottom riser on a glass door, a sunken fireplace, or excessive lava rock/cinders densely packed against the grate, can also cause the heater to shut off.
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Christina ArnoldAug 22, 2025
Why is there a gas odor from my Monessen Hearth DEB24 Gas Heater even when it's off?
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  timothybrownAug 22, 2025
  If your Monessen Hearth Gas Heater has a gas odor even when the control knob is in the OFF position, this is likely due to a gas leak. You should locate and correct all leaks. Alternatively, the control valve may be defective, in which case it should be replaced.
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grayjonathonAug 25, 2025
How to fix no spark at pilot on Monessen Hearth Gas Heater?
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  Jennifer WhiteAug 26, 2025
  If the ignitor button is pressed and there is no spark at the ODS/pilot of your Monessen Hearth Gas Heater, there could be several reasons. The ignitor electrode might be positioned wrong or broken, in which case you should replace the ignitor. The ignitor electrode might not be connected to the ignitor cable; reconnect the ignitor cable. The ignitor cable could be pinched or wet; free the ignitor cable if it's pinched by any metal or tubing. A broken ignitor cable should be replaced. Finally, a bad piezo ignitor should also be replaced.
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Vicki JacobsAug 30, 2025
Why does the pilot light go out on my Monessen Hearth DEB24 Gas Heater when I release the knob?
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  Anthony WilliamsAug 31, 2025
  If the ODS/pilot lights, but the flame goes out when the control knob is released on your Monessen Hearth Gas Heater, ensure the control knob is fully pressed in. If that doesn't work, after the ODS/pilot lights, keep the control knob pressed in for 30 seconds. Also, fully open the manual shutoff valve. Check the thermocouple connection at the control valve and hand tighten it until snug, then tighten it an additional 1/4 turn. If the pilot flame is not touching the thermocouple, contact your local gas company, as this could be due to low gas pressure or a dirty/partially clogged ODS/pilot. Replace the thermocouple if it is damaged. Finally, the control valve might be damaged, so replace it if necessary.
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Kendra JohnsonSep 2, 2025
Why does my Monessen Hearth DEB24 backfire?
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  cynthia15Sep 2, 2025
  If your Monessen Hearth Gas Heater burner backfires during combustion, it could be due to low manifold pressure. Contact your local gas company to check this. Alternatively, the burner orifice might be clogged; try cleaning the burner or replacing the burner orifice.
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qstevensSep 5, 2025
Why is my Monessen Hearth Gas Heater smoking during initial use?
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  David KempSep 5, 2025
  If your Monessen Hearth Gas Heater produces slight smoke or odor during initial operation, it may be due to a clogged or damaged burner orifice. Try cleaning the burner or replacing the burner orifice. Another possibility is that the burner itself is damaged, in which case you should replace it. Finally, a defective gas regulator could be the cause, so replace the gas regulator if necessary.
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John RussoSep 8, 2025
Why are the logs smoking in my Monessen Hearth DEB24 Gas Heater?
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  Jeffrey JonesSep 9, 2025
  If the logs appear to smoke after initial operation of your Monessen Hearth Gas Heater, it is likely due to vapors from paint or the curing process of the logs. This problem should stop after a few hours of operation. Run the heater with the damper open (if you have one) or open a window for the first few hours. If the log heater is intended to be smokeless, turn off the heater and call a qualified service person.
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Eric DelacruzSep 12, 2025
Why is my Monessen Hearth DEB24 whistling?
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  April ShieldsSep 12, 2025
  If your Monessen Hearth Gas Heater produces a whistling noise when the burner is lit, it could be due to turning the control knob to the HIGH position when the burner is cold; turn the control knob to the LOW position and let it warm up for a minute. Air in the gas line could also cause this; operate the burner until the air is removed from the line and have the gas line checked by your local gas company. Alternatively, dirty or partially clogged burner orifices might be the cause; clean the burner or replace the burner orifice.
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Gloria LewisNov 26, 2025
What to do if my Monessen Hearth Gas Heater has a spark but no ignition?
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  Janice RogersNov 27, 2025
  If the ignitor button is pressed and there is a spark at the ODS/pilot, but no ignition occurs on your Monessen Hearth Gas Heater, there are several potential causes. First, check if the gas supply is turned off or if the manual shutoff valve is closed; if so, turn on the gas supply or open the manual shutoff valve. Next, ensure the control knob is in the PILOT position. Also, make sure the control knob is pressed in while in the PILOT position. If there is air in the gas lines from installation, continue holding down the control knob and repeat the igniting operation until the air is removed. A clogged ODS/pilot can also prevent ignition; replace the ODS/pilot assembly or get it serviced. Finally, the gas regulator setting might not be correct; check the incoming pressure and replace the ...

Summary

Important Safety Information

General Safety Precautions

Covers general safety rules for appliance installation and operation, including placement and supervision.

Carbon Monoxide Poisoning

Explains signs and actions related to carbon monoxide poisoning from gas heaters.

Installation and Operation Warnings

Details warnings about appliance changes, improper use, and airflow modifications.

Flammable Liquids and Vapors

Advises against storing flammable materials, like gasoline, near the appliance.

Getting Started

Parts Checklist

Guide to verifying all necessary parts have been received before installation.

Installation Requirements

Lists items and tools needed for the installation process.

Product Features and Specifications

Ignition Controls

Describes the manual, Hi/Lo, and Milli-Volt/T-Stat ignition systems.

Pilot and ODS Assembly

Explains the Pilot/ODS safety feature and its function in monitoring oxygen levels.

Thermal Generator

Details the function of the thermal generator in Milli-Volt systems.

General Installation Information

Codes and Standards

Specifies adherence to National Fuel Gas Code and local regulations.

Combustion and Ventilation Air

Explains requirements for adequate air supply in confined or unusually tight spaces.

Fireplace and Hearth Dimensions

Hearth Minimum Dimensions

Provides minimum dimension requirements for fireplace hearths for different models.

Placement in a Fireplace with a Restrictive Barrier

Barrier Guidelines

Offers guidelines for fireplace placement with bottom front opening barriers like glass doors.

Clearances and Height Requirements

Sidewall and Ceiling Clearances

Specifies minimum clearances from combustible walls and ceilings around the fireplace opening.

Heat Resistant Material (No Mantel)

Details requirements for heat resistant material when no mantel is present.

Heat Resistant Material (With Mantel)

Outlines requirements for heat resistant material with mantels or projections.

Floor Clearance

Fireplace Preparation

Installing Vented Applications

Guidelines for installing the appliance as a vented decorative log set.

Damper Stop Installation

Procedure for installing a damper stop to ensure proper flue opening.

Connecting the Gas

Checking Gas Pressure

Manual Control Pressure Check

Instructions for checking gas pressure on manual control units.

Milli-Volt;T-Stat Control Pressure Check

Instructions for checking gas pressure on Milli-Volt/T-Stat units.

Hi;Lo Remote Control Pressure Check

Instructions for checking gas pressure on Hi/Lo remote control units.

Electrical Wiring (Milli-Volt)

Connecting Optional Wall Switch or Thermostat

Wiring instructions for connecting optional wall switches or thermostats.

Connecting Remote Receiver

Steps for connecting the remote receiver unit to the gas log system.

Installing T-Stat Sensor

Procedure for installing the thermostat sensor and wiring harnesses.

Operation of Thermostat Sensor

Checking System Operation

Guide for checking the milli-volt system and components using a meter.

Log Placement

Installing Logs on Grate

Instructions for correctly positioning the ceramic fiber logs on the grate.

Placing Decorative Rock

Guidance on where to place volcanic rock around the appliance to prevent sooting.

Flame Appearance

Checking the Pilot Flame

How to check for the correct pilot flame appearance for various control types.

Checking the Burner Flame

Operating Instructions

General operating advice, including break-in period, drafts, and glass doors.

Operating Instructions

Safety Before Lighting

Critical safety steps and warnings to follow before attempting to light the appliance.

Manual Control Lighting

Step-by-step guide for lighting the pilot and burners with manual controls.

Milli-Volt & Thermostat Control Lighting

Instructions for lighting pilots and burners with Milli-Volt/Thermostat controls.

Hi;Lo Remote Control Lighting

Procedures for lighting pilots and burners using Hi/Lo remote controls.

Cleaning and Servicing

Match Lighting Instructions

Alternative pilot lighting method using a match if piezo ignitor fails.

Periodic Cleaning

Routine cleaning tasks for logs, burners, and exterior components.

Annual Cleaning;Inspection

Comprehensive annual checks and cleaning procedures for optimal performance.

Troubleshooting

Replacement Parts

Burner Assembly Parts

List and diagrams of replacement parts for the burner assembly.

Log Replacement Parts

Catalog of replacement logs for different models (DEB20, DEB24, DEB30).

Notes

Warranty Policy

Lifetime Warranty

Components covered by a lifetime warranty against defects.

Five Year Warranty

Components covered by a five-year warranty against defects.

Basic Warranty

Standard two-year warranty on components and materials against defects.