Coleman Mach 7330-3343 Replacement 2 Amp Fuse -- 3-Pack
OEM-spec fast-acting glass tube fuses that protect the control board in Coleman Mach RV thermostats. Keep a 3-pack on hand so a blown fuse never sidelinesyour air conditioning or heat pump system mid-trip.
A blown 2 amp control fuse is one of the most common reasons a Coleman Mach thermostat goes dark or stops responding. This OEM-replacement fuse -- part number 7330-3343 -- restores protection to the low-voltage control circuit without guesswork. The fast-acting glass tube design matches the original fuse specification used across many Coleman Mach wall thermostat and digital control applications.
Buying a 3-pack makes sense for RV owners: stow one spare in the rig's tool kit and another in the parts bin at home. Fuses this small are easy to lose, and having extras on hand means a thermostat fault gets resolved in minutes rather than requiring a parts run.
Direct Coleman Mach 7330-3343 replacement -- matches original spec exactly
Glass tube fast-blow design responds immediately to overcurrent events
Three fuses per order -- keep spares on board and at home
Rated 2 amps to protect sensitive thermostat and control board electronics
The 2 amp fuse in a Coleman Mach thermostat sits in the low-voltage control circuit between the thermostat's power input and its internal board. When this fuse blows, the thermostat will appear completely dead -- no display, no response -- even though the main 120V or 12V supply to the air conditioner is intact. Replacing this fuse is typically the first diagnostic step when a Coleman Mach thermostat stops functioning.
Part 7330-3343 is used across a broad range of Coleman Mach wall thermostats and digital controls, including many models sold under the Coleman Mach and Airxcel brands. If your current thermostat's fuse holder contains a 5x20mm or equivalent small glass tube fast-blow fuse rated at 2 amps, this is the correct replacement. Verify the fuse rating printed on your existing fuse or in your thermostat's wiring diagram before installing.
A fuse that blows repeatedly indicates an underlying wiring or component fault -- not just a weak fuse. If the replacement fuse blows again quickly, discontinue use and have the thermostat wiring and control board inspected. Never substitute a higher-amperage fuse to "fix" a recurring blown fuse; doing so removes the overcurrent protection the fuse provides and risks damaging the control board or causing a fire.