QHHR RV Wall Thermostat and Relay Box Replacement for Dometic 3316230.000 — Black LCD Thermostat, Heat/Cool Control

QHHR 3316230.000 RV wall thermostat and relay box replaces Dometic units to give campers reliable heat and cooling control from an easy-to-read black wall thermostat.

This QHHR replacement thermostat and relay assembly is designed for RVs, trailers, and campers that use Dometic-style HVAC systems. It combines a wall-mounted control and relay box to manage on-board air conditioners and furnaces, offering a clear LCD readout and simple temperature adjustment. The unit ships with a one-year warranty and fits parts listed as 3316230.000 and 3316230.700, while the compatible black wall thermostat model number is 3316230.714.

How will this thermostat work with my RV’s existing Dometic system?

The QHHR unit is built to be a direct replacement for the Dometic part numbers referenced, providing matching electrical and mounting points for straightforward swaps. It integrates with the RV’s HVAC wiring to operate cooling and heating via the relay box, minimizing installation time for experienced DIYers or technicians.

• Direct compatibility with Dometic parts 3316230.000 and 3316230.700
• Black wall thermostat model 3316230.714 for consistent appearance
• Standard relay wiring that connects to existing HVAC circuits
• Designed to match original mounting and connector layouts where noted

What features make the display and controls easy to use?

The thermostat includes a clear LCD display engineered for legibility in varied light and typical RV interiors. Controls are simple and intuitive, allowing you to set target temperatures quickly without navigating complex menus, which is ideal when you want fast comfort adjustments on the road.

• High-contrast LCD screen for easy reading in low light
• Basic temperature up/down controls for quick changes
• Simple mode selection for heat or cool operation
• Minimalist faceplate design suited to RV interiors

What should I expect during installation and maintenance?

Installation typically involves removing the old thermostat, matching wiring terminals, and securing the new relay box and wall thermostat in place. Basic troubleshooting and occasional cleaning of the thermostat face and connectors will keep the unit performing as expected; professional installation is recommended if you’re not comfortable with vehicle electrical systems.

• Swap-in replacement for compatible part numbers to reduce fitment issues
• Requires matching wire connections to existing HVAC harness
• Gentle periodic cleaning of the LCD and terminals advised
• One-year manufacturer warranty covers defects under normal use

How does the relay box improve HVAC reliability in a camper?

The relay box centralizes switching for heating and cooling loads, protecting the thermostat from high current draw and reducing wear on the control circuitry. By using a dedicated relay assembly, the thermostat operates as a low-voltage controller while the relay handles the heavier electrical load of the RV’s air conditioner or furnace.

• Relays carry heavy loads, extending thermostat life
• Cleaner separation of control and power circuits for safety
• Reliable switching reduces intermittent HVAC faults on the road
• Designed for the electrical demands of RV appliances

Who is this for: This QHHR thermostat and relay box is aimed at RV owners, camper renovators, and service technicians who need a dependable Dometic-compatible replacement. It’s well suited for anyone replacing worn or faulty control units, updating a camper’s interior with a black thermostat face, or installing a like-for-like part during HVAC maintenance. If you prioritize straightforward installation, clear readouts, and rugged relay switching for reliable temperature control while traveling, this unit is a practical choice.