E19
Dettson
Gas Pressure / Manifold Pressure Fault
Dettson furnace displays E19; unit may run at reduced capacity or shut down intermittently.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Incorrect inlet gas pressure, Misadjusted gas valve regulator, Blocked gas supply line, Undersized gas piping to furnace
How to Fix / Troubleshooting
Critical safety warning: Gas pressure adjustments must be performed by a licensed gas technician with proper instruments. Do not attempt to adjust the gas valve yourself.
- 1. Check for other appliance issues: Note whether other gas appliances (water heater, stove) are also having problems, which may indicate a supply issue.
- 2. Inspect gas shutoff valves: Ensure all manual gas valves to the furnace are fully open.
- 3. Call gas utility or technician: If E19 appears, contact your gas supplier or a licensed technician to measure inlet and manifold pressure and correct any piping or regulator issues.
- 4. Do not operate furnace if unsafe: If you smell gas or suspect overfiring/underfiring, leave the furnace off until it is professionally inspected.
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Repair Difficulty
Professional Required
5/5
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