OWNER’S MANUAL

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 heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater.

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 in, there is no

1.

Ignitor electrode positioned wrong

1.

Replace ignitor

spark at ODS/pilot

2.

Ignitor electrode broken

2.

Replace ignitor

 

3.

Ignitor electrode not connected to igni-

3.

Reconnect ignitor cable

 

 

tor cable

 

 

 

4.

Ignitor cable pinched or wet

4.

Free ignitor cable if pinched by any

 

 

 

 

metal or tubing. Keep ignitor cable dry

 

5.

Broken ignitor cable

5.

Replace ignitor cable

 

6.

Bad piezo ignitor

6.

Replace control valve (piezo is part of

 

 

 

 

control valve)

 

 

 

 

 

ODS/pilot lights but flame goes out when

1.

Gas supply turned off or equipment

1.

Turn on gas supply or open equipment

control knob is released

 

shutoff valve closed

 

shutoff valve

 

2.

Control knob not fully pressed in while

2.

Fully press in control knob while press-

 

 

pressing ignitor button

 

ing ignitor button

 

3.

Air in gas lines when installed

3.

Continue holding down control knob. Re-

 

 

 

 

peat igniting operation until air is removed

 

4.

Depleted gas supply

4.

Contact local propane/LP gas company

 

5.

ODS/pilot is clogged

5.

Clean ODS/pilot (see Cleaning and

 

 

 

 

Maintenance, page 14 ) or replace ODS/

 

 

 

 

pilot assembly

 

6.

Gas regulator setting is not correct

6.

Replace gas regulator

 

7.

Control knob not in pilot position

7.

Turn control knob to pilot position

 

 

 

 

 

When ignitor button is pressed in, there is a

1.

Control knob not fully pressed in

1.

Press in control knob fully

spark at ODS/pilot but no ignition

2.

Control knob not pressed in long enough

2.

After ODS/pilot lights, keep control

 

 

 

 

knob pressed in 30 seconds

 

3.

Equipment shutoff valve not fully open

3.

Fully open equipment shutoff valve

 

4.

Thermocouple connection loose at con-

4.

Hand tighten until snug, then tighten

 

 

trol valve

 

1/4 turn more

 

5.

Pilot flame not touching thermocouple,

5.

A) Contact local propane/LP gas company

 

 

which allows thermocouple to cool,

 

B) Clean ODS/pilot (see Cleaning and

 

 

causing pilot flame to go out. This prob-

 

Maintenance, page 14) or replace ODS/

 

 

lem could be caused by one or both of

 

pilot assembly

 

 

the following:

 

 

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged ODS/pilot

 

 

 

6.

Thermocouple damaged

6.

Replace thermocouple

 

7.

Control valve damaged

7.

Replace control valve

www.desatech.com

Continued

 

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Desa FBS-3C, FB-5B, FBS-5C installation manual Troubleshooting, Observed Problem Possible Cause Remedy
Page 14 Page 16

FBS-3C, FB-5B, FBS-5C specifications

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The Desa FBS-5C distinguishes itself with its high efficiency rating and sleek design. This model incorporates a robust heat exchanger that maximizes thermal efficiency, ensuring that energy consumption is minimized while delivering consistent warmth. The advanced digital thermostat allows users to set precise temperatures, while the programmable timing function enables enhanced control over heating schedules. Safety is paramount, and the FBS-5C features multiple safety mechanisms, including over-temperature protection and tip-over shutoff.

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The FBS-3C model takes innovation a step further by integrating smart technology into its operating system. This model is Wi-Fi enabled, allowing users to control their heating remotely via smartphone applications. The adaptability of the FBS-3C ensures that it can seamlessly integrate with smart home systems, providing a convenient and user-friendly experience. Energy monitoring features enable users to track consumption and adjust settings to optimize efficiency, ultimately reducing heating costs and environmental impact.

In conclusion, Desa's FBS-5C, FB-5B, and FBS-3C models offer a range of features that cater to different heating needs. With their focus on efficiency, safety, and smart technology, these models exemplify the future of heating solutions. Whether for a cozy home setting or a commercial application, Desa's innovative approaches ensure warmth and comfort while promoting sustainability and user convenience.
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