How old is my Empire Wall furnace?
For an Empire DV-235-3SG wall furnace, we determine the age from the serial number on the rating plate. On many Empire wall heaters, the first two serial digits indicate the manufacture year and the next two digits indicate the week of that year.
Where to find the rating plate
Look for a data label on the heater cabinet; common locations include:
- Inside the front cover or lower access panel
- On the side of the cabinet behind the grille
- Near the gas valve compartment
- On the back or side of the unit (visible from the room side)
If the label is dirty, wipe it gently so you can read the full serial number clearly.
How to decode the serial number (typical Empire format)
Once you have the serial number, use this quick read:
- Digits 1 to 2: year (for example, 21 = 2021, 19 = 2019)
- Digits 3 to 4: week of the year (01 to 52)
Example
If your serial number starts with 2015, that typically means:
| Serial starts with | Interprets as | Approx. build time |
|---|---|---|
| 2015 | Year 2020, week 15 | Mid-April 2020 |
Why it matters
Knowing the build date helps us match the correct replacement parts (like an igniter, thermocouple, gas valve components, or a blower kit if equipped) and it also helps you plan maintenance for safe, reliable heating.
If the serial format does not match
Some units use a different serial pattern depending on production run. If the first four digits do not decode cleanly, use the model number DV-235-3SG and the full serial number when you search our parts resources on Sears PartsDirect.
Last updated: February 2026
How to light pilot on empire wall heater?
To light the pilot on your Empire DV-235-3SG wall furnace, turn the gas control knob to PILOT, press and hold the knob in, and press the igniter until the pilot lights; keep holding the knob about 30 to 60 seconds so the safety sensor heats, then switch to ON.
Before you start (safety)
- Set the thermostat to the lowest setting.
- Smell for gas near the heater and near the floor; if you smell gas, do not light it.
- If the knob was on OFF, wait 5 minutes before relighting.
- Open the access panel so you can see the pilot burner.
- Use a flashlight for visibility (not an open flame).
Pilot lighting steps
- Turn the gas control knob counterclockwise to PILOT.
- Press and hold the knob in.
- While holding the knob, press the igniter button repeatedly until the pilot flame appears.
- Keep holding the knob 30 to 60 seconds, then release.
- Turn the knob to ON.
- Raise the thermostat to call for heat; the main burner should ignite.
If the pilot will not light or will not stay lit
- Hold the knob in longer (up to 60 seconds).
- Make sure the pilot flame is steady and hitting the sensor tip.
- Vacuum dust from the pilot area and air openings.
- If there is no spark, check the igniter button and wire connections.
- If it lights but goes out when you release the knob, the thermocouple or gas valve safety circuit needs service.
Quick troubleshooting table
| Symptom | Common cause | Next step |
|---|---|---|
| No spark | Loose/damaged igniter lead | Reseat connections; inspect for cracks |
| Spark but no flame | Gas off or pilot orifice clogged | Confirm gas supply; clean pilot opening |
| Lights then goes out | Sensor not heating | Hold longer; clean/reposition flame path |
Why it matters
The pilot flame must heat the thermocouple so the gas valve stays open; this prevents unburned gas from flowing into the room.
For parts lookup by model number, use the parts list for DV-235-3SG or search on Sears PartsDirect.
Last updated: February 2026
What are the parts of a heater?
For an Empire DV-235-3SG wall furnace, the “parts of a heater” usually means the components that control gas flow, create ignition, prove flame, move warm air, and keep the unit safe. Exact part names vary by configuration, but the functions below are the core building blocks.
Common wall heater parts and what they do
- Thermostat or wall control: tells the heater when to start and stop.
- Gas valve: opens and regulates gas flow to the burner.
- Burner assembly: mixes gas and air and produces the flame.
- Ignition system (pilot/igniter): lights the burner.
- Flame-sensing safety (thermocouple/thermopile or flame sensor): confirms flame so gas can stay on.
- Limit switch / safety switches: shut the heater down if it overheats or drafts poorly.
- Blower motor and fan (if equipped): pushes heated air into the room.
Quick “parts map” by system
| System | Typical components | What you notice when it fails |
|---|---|---|
| Gas and combustion | gas valve, burner, orifice/manifold | no heat, weak flame, delayed ignition |
| Ignition and flame proving | igniter/pilot parts, thermocouple/thermopile | burner won’t stay lit, frequent shutdowns |
| Air movement | blower motor, fan wheel | heat stays in cabinet, poor airflow, noise |
| Safety and control | thermostat, limit switch, wiring | short cycling, no response, intermittent heat |
Why it matters
Knowing the “system” that matches your symptom helps you narrow the right replacement part faster and avoid swapping good parts. For example, “pilot lights but won’t stay on” points to flame-proving parts, not the blower.
How we recommend identifying the right replacement
- Confirm the model is DV-235-3SG (from the rating plate).
- Match the symptom to the system in the table above.
- Inspect for obvious issues first: loose wires, soot buildup, blocked airflow.
- If you’re testing electrical components, use safe meter practices; our how to use a multimeter to test electrical parts video is a good baseline.
- Use the model parts list to match the correct component, then order through the model page or search by model on Sears PartsDirect.
Last updated: February 2026
What is the warranty on Empire DV-235-3SG?
Empire DV-235-3SG wall furnace warranty coverage is typically split by component: the combustion chamber (heat exchanger) is covered longer, and most other parts are covered for a shorter period. Use your warranty certificate and proof of purchase to confirm the exact terms for your unit.
Typical warranty structure for this Empire wall furnace
Most Empire direct-vent wall furnaces in this product family use a two-tier limited warranty structure:
- Combustion chamber (heat exchanger): longer coverage period
- Gas valve and controls: shorter coverage period
- Electrical components (switches, wiring, igniter): shorter coverage period
- Blower or fan components (if equipped): shorter coverage period
- Finish and cosmetic items: often limited or excluded
What to verify on your DV-235-3SG paperwork
Check these items so you apply the warranty correctly:
- Warranty length for the combustion chamber vs. all other parts
- Whether labor is included or parts-only coverage applies
- Installation requirements (correct gas type, venting, clearances)
- Maintenance requirements (cleaning, inspection intervals)
- Claim requirements (proof of purchase, model and serial number)
Quick reference: what “split coverage” means
| Component group | What it includes | Why it’s separated |
|---|---|---|
| Combustion chamber | Heat exchanger/combustion chamber | Highest-heat, long-life component |
| All other parts | Controls, valves, wiring, switches, accessories | More wear, more installation sensitivity |
Why it matters
Knowing which components have longer coverage helps you decide whether to pursue a warranty claim or move straight to troubleshooting and repair, especially for ignition, control, or wiring-related symptoms.
Parts lookup and model identification
Match the rating plate model number exactly to DV-235-3SG before ordering parts or researching diagrams. If you need to search by model number for replacement parts, use Sears PartsDirect.
Last updated: February 2026
