Richmond Error Code E2: Dry Fire
How to Fix Richmond Code E2
- Step 1: Immediately turn off the gas supply to the water heater. There should be a shut-off valve on the gas line leading to the unit.
- Step 2: Turn off the electrical power to the unit at the breaker box.
- Step 3: Check that the main water supply to the house is turned on. Then, verify that the shut-off valves on the cold water inlet line to the tankless unit are fully open.
- Step 4: If you suspect air in the lines, try opening a hot water faucet somewhere in the house to bleed any trapped air. Let it run for several minutes.
- Step 5: Do not attempt to restart the unit. Call a qualified HVAC technician or plumber to diagnose and repair the problem.
What Does Richmond Error Code E2 Mean?
The Richmond tankless water heater displays an 'E2' error code when it detects a 'Dry Fire' situation. This means the unit is trying to fire up the burner, but it's not sensing any water flowing through the heat exchanger. Without water to absorb the heat, the unit can rapidly overheat, potentially damaging components like the heat exchanger itself, the burner, or even creating a fire hazard. This is a critical safety issue, so it's important to address it immediately. The unit will likely lock out and stop operating until the issue is resolved. A dry fire can occur for several reasons, all related to lack of water flow or a sensor malfunction.
Common Causes of Richmond Code E2
- Water supply to the unit is shut off or restricted.
- The flow sensor is malfunctioning and not detecting water flow even when it exists.
- Air is trapped in the system, preventing proper water flow.
- The water inlet filter is clogged, restricting water flow.
- The heat exchanger is scaled or blocked, preventing water flow.
Applicable Richmond Models
Need a Pro to Fix Richmond Code E2?
This error requires immediate attention from a licensed HVAC technician. Do not attempt repair yourself.
Find a Licensed Tech Near You →