Pellet Stove Repair in Pasadena: Written Report in Plain Language

The call came from a homeowner on a tree-lined block near the Arroyo Seco corridor. She'd converted her original Craftsman bungalow fireplace to a pellet stove insert about six years ago. Last November, the stove fired up fine for the first few evenings, then started shutting itself off mid-burn. The auger motor would run for a few seconds, stop, and throw an error code on the control board. Pellets were piling up in the hopper but barely feeding into the burn pot. She assumed it was bad fuel and swapped bags. Same problem. By the time she reached Ashgard Chimney Sweep, she was worried about carbon monoxide risk and whether the stove was safe to run at all.

Her concern was reasonable. A pellet stove that misfires repeatedly can push uncombusted gases into a room, especially in older Pasadena Craftsman homes where the original flue dimensions were sized for open hearths, not modern inserts. She also mentioned a faint burning-plastic smell near the hopper, which pointed toward an electrical component failing under load. We scheduled a diagnostic visit for the following morning. Before arriving, we reviewed the stove's make and model so we could bring the right replacement parts. In neighborhoods like Old Pasadena and the blocks feeding into San Marino, we see a lot of retrofit pellet inserts in pre-war masonry, and each one has its own quirks based on the original firebox geometry.

On-site, we ran the stove through a full startup cycle while monitoring each component. The auger motor was drawing excessive amperage, a sign the internal gear mechanism was binding. That explained the intermittent feed. We also tested the igniter element. It glowed, but weakly. A healthy igniter reaches around 1,000°F within a few minutes. Hers barely cleared 700°F, which meant pellets would smolder instead of catching cleanly. The combustion blower tested fine, and the hopper sensor was functioning. We replaced the auger motor and igniter on the spot, then recalibrated the control board's feed rate to match the stove manufacturer's spec. Per NFPA 211 standards, we performed a Level 1 visual inspection of the venting system to confirm the liner and termination cap were intact. No cracks, no creosote migration into the chase walls.

After reassembly, we ran three full burn cycles. Pellet feed was consistent, ignition happened within ninety seconds, and exhaust temperatures held steady. We recommended she schedule a full chimney sweep before next season since six years of pellet ash buildup inside the flue liner can restrict draft. For Pasadena homeowners considering a pellet stove or maintaining one in a retrofit firebox, the EPA maintains a list of EPA certified pellet stoves that meet current emissions and efficiency requirements. If your stove is older or unlisted, a diagnostic visit can tell you whether repair makes sense or whether it's time to upgrade to a certified unit.