Lrichy RV Thermostat OEM 7330G3351 6-Wire White — Direct-Fit for Coleman Mach, Relay-Driven Control

Lrichy OEM 7330G3351 is a direct-fit 6-wire RV thermostat designed to replace Coleman Mach-series controls and manage single-stage heating, cooling and fan systems with precise temperature switching.

This Lrichy thermostat is built to match OEM performance for many Coleman RV air conditioners and heaters while offering straightforward wiring and a dependable relay-driven interface. It works with 115 VAC A/C circuits via low-voltage 12 VDC relays, making it suitable for typical RV ceiling assembly control panels and compatible furnace circuits that draw under one amp. The white, low-profile housing and color-coded wiring aim to simplify installation for DIYers and technicians alike.

Will this thermostat fit my Coleman Mach air conditioner?

Yes — this model is manufactured to OEM specifications and replaces common Coleman factory part numbers used across several Mach-series units. Confirm compatibility by checking your current thermostat's wiring count and OEM part number.

• Compatible with Coleman Mach 15, Mach 3 Plus, Mach 1 Power Saver, Mach III Power Saver, Mach 8 Polar Cub, Mach 8, and Roughneck series.
• OEM references: 7330G3351 and 7330F3852 for cross-checking.
• Six-wire connector layout matches Coleman ceiling assembly harnesses.
• White housing and mounting pattern align with standard RV installations.

How does the 6-wire setup control heating and cooling functions?

The thermostat uses six pre-treated, color-coded wires to switch single-stage heat, cool and fan circuits through internal 12 VDC relays. That arrangement allows the low-voltage control logic to operate higher-voltage components without complex rewiring.

• Single-stage switching enables separate control of heat, cool and fan modes.
• 12 VDC relay interface drives 115 VAC A/C circuits safely.
• Color-coded wires and included instructions reduce installation mistakes.
• Suitable for RV furnace control circuits drawing less than one amp.

How difficult is installation and what tools or steps are needed?

Installation is designed for quick, straightforward replacement of like-for-like thermostats: remove the old unit, match wire colors, and secure the new thermostat in place. The package includes wiring instructions and pre-treated wires to lower the chance of connection errors.

• Tools typically needed: screwdriver, wire stripper/crimper, and a multimeter for verification.
• Follow the color-code mapping provided to match existing harness wires.
• Mounting aligns with standard RV thermostat screw locations — no enclosure modification usually required.
• Test each mode (heat, cool, fan) after wiring to confirm proper operation.

What warranty and support does Lrichy provide for this thermostat?

Lrichy stands behind the build quality with a two-year warranty and a customer-focused return policy to resolve product defects or fitment issues. If you encounter problems, their support channels aim to offer refunds, exchanges, or troubleshooting guidance.

• Two-year warranty covering manufacturing defects.
• Free exchange or refund policy for qualifying returns.
• Customer support available for wiring guidance and compatibility questions.
• Purchase via Amazon provides added buyer protections.

Who this thermostat is for: This Lrichy OEM 7330G3351 replacement suits RV owners, fleet maintenance technicians, and DIY installers needing a reliable, OEM-compatible control for Coleman Mach-series air conditioners and compatible furnace circuits. Choose this thermostat if you want a direct-fit, six-wire solution with clear wiring guidance and a solid warranty, especially when replacing worn or failing ceiling assembly controls in travel trailers, motorhomes, or work vans.