Montague Oven Error Code Er01: Noise in the Circuit
Er01 on the Montague V136EO-4I convection oven control means the control has picked up noise in its circuit. The manual says to clear it by turning off power to the oven, then have the quick disconnects and snubbers checked. If it returns after a restart, call a technician.
Medium: it clears with a power reset, but a repeat points to a connection or suppression problem.
What does Montague error code Er01 mean?
The convection oven on this range has its own electronic control, and the manual lists a short set of Er codes for it. Er01 is the one that describes electrical interference: the control reports that there is noise in the circuit and shows Er01 on the oven control display. Noise here means unwanted electrical signal on the lines the control reads or switches, the kind of disturbance that can come from a poorly seated connection or from a switching load whose suppression has stopped working. The manual gives one cause, noise in the circuit, and a two-part answer. First, clear the code by turning off power to the oven. Second, check all quick disconnects and snubbers for proper connection and function, replacing them if necessary, and contact a service provider. The manual does not say what the oven does while Er01 is shown, so we do not describe a stop or a limp mode. The first part can be done by an operator, the second needs the panels off.
Affected models and control systems
Montague Legend electric range model V136EO-4I, convection oven only. Er01 is listed under Service, Error Codes on printed p. 12.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Er01 on the oven control display
- Oven control that behaves erratically or resets
- Code that disappears after power is cut and returns later
Possible causes
Listed in Montague's documentation
- Noise in the circuit
Other likely causes — what usually sits behind error code Er01 on this control. A technician confirms which one it is before any part is replaced.
- A quick disconnect on the oven wiring that has loosened or corroded
- A snubber across a relay or contactor that no longer suppresses switching noise
- A newly added electrical load on the same supply that injects interference
Safe checks before calling for service
- Turn off power to the oven, as the manual says, wait a minute, and turn it back on.
- Watch the display for Er01 during the next warm-up.
- Do not open any panel to look at quick disconnects or snubbers; that is for a technician.
- If Er01 returns, note when: at power-up, when a heating element switches, or when the fan starts.
How a technician diagnoses error code Er01
- Read the code and ask when it appears and whether it clears on a power cycle.
- With power isolated, inspect each quick disconnect for fit, heat marks and corrosion.
- Check the snubbers for proper connection and measure them where the unit specification allows.
- Replace any disconnect or snubber that is damaged, as the manual advises.
- Restore power and run a full bake cycle to prove the code does not come back.
- Quick disconnects and snubbers sit in the oven wiring behind panels, where line-voltage parts are exposed.
- A snubber that has failed can look normal, so it takes a technician's test to condemn it.
- The manual names a service provider for the follow-up, so only the power-off reset is left to the operator.
How error code Er01 differs from similar codes
Er01 is the noise code. Er03 is an invalid state that also clears by turning power off, and Er02 is a lost link between boards.
Technical reference
- Document
- Montague Legend Electric Range, Operation Manual, Installation/Operations
- Edition
- No revision printed (file name: Final-Submission; listed on montaguecompany.com/manuals in 2026)
- Models / control
- Legend Electric Range model V136EO-4I (convection oven only)
- Section
- Service, Error Codes, printed p. 12
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Montague range error codes
Will Er01 clear if I turn the oven off?
That is the manual's first step: clear the code by turning off power to the oven. It may well clear, but the manual also says to check the disconnects and snubbers.
Is Er01 a sign the control board has died?
The manual does not say so. It points to the circuit noise, the quick disconnects and the snubbers first.
Do the Er codes apply to the range top?
No. These Er codes belong to the convection oven on the V136EO-4I.
Need help with Montague error code Er01?
A technician confirms the cause on site and gives you the price in writing before any work starts.