Coleman Mach (Mechanical) error code POOR COOLING
Both fan and compressor run but cooling is weak. Usually airflow restriction, dirty coil, or low refrigerant.
What to check, and in what order, is in the app. The flow Coleman: AC Runs But Cools Poorly walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Coleman_8000_Service_Manual.txt
Models covered
{'id': 'coleman_standard', 'label': 'Standard Coleman-Mach (Mach series + Zone Control)', 'tagline': 'Mach 1 / 3 / 3+ / 8 / 10NDQ / 15 / Q plus 8-Series and 9-Series Zone Control. Standard 12 VDC 9-pin and zone-control architectures - the bulk of the Coleman-Mach rooftop lineup. (Excludes the Everest VS-18 inverter unit.)', 'flow_prefixes': ['ac_coleman_'], 'code_manufacturers': ['Coleman-Mach', 'Coleman Mach', 'RVP', 'Airxcel RVP', 'Coleman-Mach 8-Series Zone', 'Coleman-Mach 9-Series Zone', 'Coleman Mach (Mechanical)'], 'component_exclude_keywords': ['vs18', 'vs-18', 'everest']}, {'id': 'coleman_everest_vs18', 'label': 'Everest VS-18 (variable-speed inverter)', 'tagline': 'Variable-speed inverter rooftop A/C with the E1-E9 / dE digital fault-code display and ACTH3 wall thermostat. Distinct inverter control board - its codes, sensors, and parts do NOT apply to the standard Mach lineup.', 'flow_prefixes': ['vs18_'], 'code_manufacturers': ['Coleman-Mach Everest VS-18'], 'component_keywords': ['vs18', 'vs-18', 'everest'], 'symptom_keywords': []}
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