由于其可靠性和合理的价格，RunTru 炉（由 Trane 制造）
如果您家中有 RunTru 暖气炉，请务必注意，与许多其他暖气炉品牌不同，RunTru 错误代码不会通过彩色或闪烁的灯光来表示。相反，RunTru 暖气炉使用字母数字代码来表示问题。
以下是一些最常见的 RunTru 炉错误代码及其含义。
请注意：请参阅炉子的用户手册以获取最准确和特定品牌的错误代码详细信息。
| RunTru 炉错误代码 | 原因 | 潜在问题 |
| E01 | Loss of the IRQ or other internal failure | Issue with the control board. The control board may need to be reset or replaced. |
| E2.1 | Retries exceeded (ignition error) | Gas valve issue, gas supply interruption, faulty igniter, or flame sensor problem (e.g., faulty or dirty sensor). |
| E2.2 | Recycles exceeded (flame sensed and lost, one hour lockout after 10 times) | Dirty or broken flame sensor, inconsistent gas flow, faulty wiring, etc. |
| E3.1 | Shorted pressure switch | Faulty pressure switch or wiring, venting problems/blockage in vent, etc. |
| E3.2 | Open pressure switch | Damaged or faulty pressure switch, cracked pressure switch hose, pressure switch hose blocked or improperly connected, loose wiring, etc. |
| E04 | Open thermal limit, rollout switch, or reverse airflow switch | Dirty/clogged filters, cracked or blocked heat exchanger, blocked vents, etc. |
| E05 | Flame detected when no flame should be present | Gas valve malfunction, dirty or defective flame sensor, slow closure, electrical fault, gas valve stuck open or closing too slowly, etc. |
| E6.1 | Voltage reversed polarity | Wiring issue. |
| E6.2 | Bad grounding | Issue with wiring. |
| E6.3 | (1) Igniter relay fails, or (2) igniter open | Faulty igniter or flame sensor, dirty filter, issue with gas line, etc. |
| E7.1 | Gas valve (MVL) energized when it should be off | Gas valve stuck open, dirty or damaged flame sensor, issues with wiring, etc. |
| E08 | Low flame current (still strong enough to allow operation) | Dirty or faulty flame sensor, low gas pressure, etc. |
| E09 | Open inducer limit switch or condensate pressure switch | Blocked condensate drain or vents, issue with pressure switch, etc. |
| E12 | Open fuse | Low airflow, issue with wiring, other faulty or worn furnace components. |