Desa VMH26TNB installation manual Troubleshooting, Observed Problem Possible Cause Remedy

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® VMH26TNB

COMPACT CLASSIC HEARTH FIREPLACE

TROUBLESHOOTING

Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.

Note: All troubleshooting items are listed in order of operation.

WARNING: Turn off and un- plug fireplace and let cool before servicing. Only a qualified ser- vice person should service and repair fireplace.

CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

When ignitor button is pressed, there is no

1.

Ignitor cable pinched or wet

1.

Free ignitor cable if pinched by any

spark at ODS/pilot

 

 

 

metal or tubing. Keep ignitor cable dry

 

2.

Ignitor electrode not connected to igni-

2.

Reconnect ignitor cable

 

 

tor cable

 

 

 

3.

Broken ignitor cable

3.

Replace ignitor cable

 

4.

Bad piezo ignitor

4.

Replace piezo ignitor

 

5.

Ignitor electrode broken

5.

Replace pilot assembly

 

6.

Ignitor electrode positioned wrong

6.

Replace pilot assembly

 

 

 

 

 

When ignitor button is pressed, there is

1.

Gas supply turned off or equipment

1.

Turn on gas supply or open equipment

spark at ODS/pilot but no ignition

 

shutoff valve closed

 

shutoff valve

 

2.

Control knob not in PILOT position

2.

Turn control knob to PILOT position

 

3.

Control knob not pressed in while in

3.

Press in control knob while in PILOT

 

 

PILOT position

 

position

 

4.

Air in gas lines when installed

4.

Continue holding down control knob. Re-

 

 

 

 

peat igniting operation until air is removed

 

5.

ODS/pilot is clogged

5.

Clean ODS/pilot (see Cleaning and

 

 

 

 

Maintenance, page 19) or replace ODS/

 

 

 

 

pilot assembly

 

6.

Gas regulator setting is not correct

6.

Replace gas regulator

 

 

 

 

 

ODS/pilot lights but flame goes out when

1.

Control knob not fully pressed in

1.

Press in control knob fully

control knob is released

2.

Control knob not pressed in long enough

2.

After ODS/pilot lights, keep control

 

 

 

 

knob pressed in 30 seconds

 

3.

Safety interlock system has been triggered

3.

Wait one minute for safety interlock sys-

 

 

 

 

tem to reset. Repeat ignition operation

 

4.

Equipment shutoff valve not fully open

4.

Fully open equipment shutoff valve

 

5.

Thermocouple connection loose at con-

5.

Hand tighten until snug, then tighten 1/4

 

 

trol valve

 

turn more

 

6.

Pilot flame not touching thermocouple,

6.

A) Contact local natural gas company

 

 

which allows thermocouple to cool,

 

 

 

 

causing pilot flame to go out. This prob-

 

B) Clean ODS/pilot (see Cleaning and

 

 

lem could be caused by one or both of

 

Maintenance, page 19) or replace ODS/

 

 

the following:

 

pilot assembly

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged ODS/pilot

 

 

 

7.

Thermocouple damaged

7.

Replace pilot assembly

 

8.

Control valve damaged

8.

Replace control valve

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107029

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Contents OWNER’S Operation and Installation Manual What to do if YOU Smell GASSafety Information Compact Classic Hearth FireplaceProduct Features Product IdentificationUnpacking Local CodesAssembly Installing LogAssembling Fireplace Assembling HoodAIR for Combustion and Ventilation Providing Adequate VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining if You Have a Confined or Unconfined Space AIR for Combustion VentilationDetermining FRESH-AIR Flow for Fireplace Location Ventilation Air From Outdoors Ventilation AIRVentilation Air From Inside Building Installation Installation ItemsCheck GAS Type Locating FireplaceBUILT-IN Fireplace Installation Locate fireplace where moving vehicle will not hit itOptional Mantel Installation Mantel Clearances for Built-In InstallationInstalling Blower Accessory GA3450T Removing Upper Louver AssemblyInstalling Blower Assembly Assembling Brass Trim Brass trim shipped with mantelInstall the switch plate on the valve For Built-In Installation Wiring Diagram For Blower Accessory Built-In InstallationAttaching Wood Base to Solid Floor Connecting to GAS SupplyExtension Cord Connecting Equipment Shutoff Valve to Heater Control Installation Items NeededChecking GAS Connections Pressure Testing Gas Supply Piping SystemPressure Testing Fireplace Gas Connections Lighting Instructions For Your Safety Read Before LightingOperating Fireplace Inspecting Burner Cleaning and Maintenance Cleaning Burner Injector Holder and Pilot AIR Inlet HoleBurner Flame Pattern CabinetTroubleshooting Observed Problem Possible Cause RemedyMaintenance, Gas leak. See Warning statement at Specifications Replacement PartsService Hints Technical ServiceIllustrated Parts Breakdown VMH26TNB17Parts List VMH26TNBAccessories 107029 Warranty Information

VMH26TNB specifications

The Desa VMH26TNB is a versatile and innovative heating appliance designed to meet the demands of modern home environments. This unit combines cutting-edge technology with practical features to provide efficient heating solutions for various spaces.

One of the key highlights of the VMH26TNB is its impressive heat output. With a powerful capacity, it can effectively heat large areas, making it ideal for living rooms, open-concept spaces, or even commercial settings. Its heating efficiency is bolstered by the incorporation of advanced thermal conduction materials that ensure maximum warmth with minimal energy consumption.

Another notable feature of the Desa VMH26TNB is its user-friendly control system. Equipped with a digital thermostat, this model allows users to set their desired temperature with precision. The intuitive interface provides real-time feedback, enabling users to monitor their energy usage and adjust settings accordingly for optimal comfort.

The VMH26TNB is also designed with safety in mind. It includes multiple safety features, such as overheat protection and a tip-over switch that automatically shuts off the unit in case it tips over. These features are crucial in preventing accidents, making this heater a reliable addition to any home.

In terms of technology, the Desa VMH26TNB stands out with its energy-efficient operation, which is compliant with modern energy standards. It uses a combination of infrared and convection heating methods that distribute warmth evenly throughout the room. This dual heating technology not only enhances comfort but also reduces energy costs.

Additionally, the unit is designed with aesthetics in mind. Its sleek and contemporary design allows it to blend seamlessly with various interior styles, making it not just a functional appliance but also an attractive element of home decor.

Lastly, ease of maintenance is another characteristic that enhances the desirability of the VMH26TNB. Its filter is easily accessible for cleaning, ensuring that the device operates at peak performance over time.

In summary, the Desa VMH26TNB is a powerful, efficient, and safe heating solution that caters to modern heating needs while providing style and convenience. Its blend of advanced technology and thoughtful design makes it an excellent choice for both residential and commercial applications.
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