Coleman-Mach thermostat fan only or no cooling call
Coleman-Mach thermostat manuals separate Fan Only or manual fan behavior from cooling calls; if FAN operates but COOL mode, zone, and setpoint do not request compressor operation, the issue may be mode/zone setup or service-only HVAC controls.
Owner-safe checklist
- Confirm COOL mode, selected zone, fan Auto/On setting, and setpoint below room temperature from the thermostat display.
- Wait through any built-in compressor delay before deciding the cooling call failed.
- Record thermostat model, display text, zone, and whether Fan Only was selected.
- Call qualified RV HVAC service if the thermostat requests cooling but the compressor never starts.
Official sources
- Coleman-Mach 9330-33 Multiple Zone Thermostat Controller System
- Coleman-Mach Digital Thermostats 9420-381 & 9420-382
- Airxcel 9430 Series Wall Thermostat Installation and Operation Instructions
- Coleman-Mach 6535-335 2 Stage Heat Pump Wall Thermostat Installation and Operating Instructions
- Coleman-Mach 6536-335 2 Stage Heat Pump Wall Thermostat Installation and Operating Instructions
- Coleman-Mach Frequently Asked Questions