Alaska Boiler & Furnace Error Code Lookup & 2026 Repair Estimator
Look up your exact Navien, Weil-McLain, Burnham, Lochinvar, Toyotomi, or forced-air furnace error code below—including what causes it during sub-zero Alaska weather and typical 2026 repair costs.
Instant Boiler & Furnace Error Code Filter
Type an error code (e.g. E003, E012, E110, 30 PSI, 3 flashes) or brand name to filter the table below:
| Brand / System | Code / Symptom | Meaning & Alaska Winter Cause | Professional Fix | 2026 Cost Range |
|---|---|---|---|---|
| Navien | E003 | Ignition Failure (No Flame Detected) Gas shutoff closed, failed igniter rod, dirty flame sensor rod, or frozen condensate drain backing up into combustion chamber. | Clean/replace igniter & flame rod, thaw condensate trap, verify Enstar gas inlet pressure. | $295 – $580 |
| Navien | E012 | Flame Loss During Operation Snow/hoarfrost blocking outdoor PVC intake/exhaust vent, fluctuating gas pressure, or grounded flame rod. | Clear exterior snow drift from vent, inspect vent slope, clean flame sensor & test gas valve. | $295 – $550 |
| Navien | E016 | Overheating of Heat Exchanger Frozen hydronic baseboard loop, airlocked zone, seized Taco/Grundfos circulator pump, or clogged internal Y-strainer. | Thaw frozen zone loop, bleed air, clean strainer & replace failed circulator pump. | $385 – $950 |
| Navien | E109 / E110 | Fan Motor or Air Pressure Switch Fault Exterior PVC exhaust/intake iced over by sub-zero wind or failed combustion blower/APS tubing. | Clear ice plug from concentric/twin-pipe termination & test air pressure switch. | $295 – $690 |
| Navien | E302 | Low Water Pressure in Boiler Loop (< 6 PSI) Failed Watts 1156 feed valve, air bleed loss, or hidden hydronic baseboard leak. | Feed system to 12–15 PSI, inspect for loop leaks & replace automatic fill valve. | $325 – $680 |
| Weil-McLain / Burnham | Solid Red Lockout LED (Aquastat) | Electronic Ignition / Flame Rollout Lockout Failed intermittent pilot igniter, bad Honeywell L8148E/L7224U aquastat relay, or tripped rollout/spill switch. | Test 24V ignition module, replace pilot assembly or aquastat control board. | $350 – $890 |
| Weil-McLain / Burnham | 30 PSI + Dripping Relief Valve | Ruptured Expansion Tank Bladder Waterlogged #30 hydronic expansion tank causes pressure to spike above 30 PSI when boiler heats to 180°F. | Replace #30 diaphragm expansion tank (pre-charged to 12 PSI) & replace 30 PSI ASME relief valve. | $420 – $780 |
| Lochinvar / Viessmann | LOC / Ignition Lockout | 3 Failed Ignition Attempts or Blocked Condensate Frozen condensate line, snow-blocked intake, or worn spark electrode. | Thaw condensate line, replace electrode/sensor & verify combustion CO2/O2. | $325 – $750 |
| Goodman / Carrier / Trane Furnace | 3 Flashes / Pressure Switch Open | Inducer Draft Pressure Switch Did Not Close Roof/wall exhaust vent frosted shut, cracked rubber pressure hose, or seized inducer fan motor. | Clear roof/wall vent frost, clear condensate trap, or replace inducer draft motor. | $295 – $780 |
| Goodman / Carrier / Trane Furnace | 4 Flashes / High Limit Open | Primary Heat Exchanger Overheated Severely clogged air filter, failed indoor blower motor/capacitor, or blocked supply registers. | Replace filter, test run capacitor (mFd), or replace blower motor. | $295 – $750 |
| Toyotomi / Rinnai (Laser 56 / 73) | E-2 / E-6 | Failed Ignition or Flame Extinction Gelled outdoor heating oil line at -20°F, carboned igniter/burner mat, or water in fuel strainer. | Thaw fuel line, clean fuel strainer, or replace igniter/burner ring. | $295 – $680 |
Alaska Boiler & Furnace Error Code FAQs
Direct answers to common questions about our property maintenance, repairs, and 24/7 emergency services.
On Navien NCB combi-boilers and NHB heating boilers in Anchorage and Wasilla: E003 is ignition failure, E012 is flame loss (often a snow-blocked outdoor PVC vent), E016 is overheating (often a frozen baseboard loop or dead circulator pump), E109/E110 is exhaust fan or air pressure blockage, and E302 is low water pressure. Call Anchor Services Alaska 24/7 at (907) 250-9156.
Never press a boiler or furnace reset button more than once. Repeatedly resetting an ignition lockout can flood the combustion chamber with unburned fuel or overheat a dry/frozen heat exchanger.