Hestan smart rangetop
showing ER04
ER04 on a Hestan Smart Burner means main power to the appliance was lost while a cooking cycle was running.
Mon–Sat, 8am–8pm
- Mode, not a failure
- No repair needed
- Source: Hestan
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What ER04
actually means.
ER04 on a Hestan Smart Burner means main power to the appliance was lost while a cooking cycle was running.
Hestan cooktop display
What to do when ER04 shows on the cooktopKind of codeMode, not a failure
A state the cooktop was put in, or one it picked deliberately — a child lock, a demo mode that lights the keys but heats nothing, a residual-heat letter over a zone that is still warm, a prompt that no pan has been found. Nothing has broken and no part is called for.
Usually leads toNo repair
Restart the cooking cycle once power is back.
Shows up asCooktop Burner Won't Light
The igniter clicks but the gas never catches, the burner lights only after several tries, or nothing happens at all when the knob is turned.
MakeHestan
A California maker of pro-style gas cooking, with rangetops for the home kitchen.
SourceHestan KRT and KRTS rangetop use and care manual, Smart Burner error codes
Hestan KRTS smart rangetop, Smart Burner only; the KRTS is not in Hestan's 2026 indoor catalog. KRT rangetops without the Smart Burner show no ER codes.
Before you book,
in this order.
Each step comes from Hestan's own guidance for ER04 on its cooktops. Follow it to the end: the last card says whether this is a visit.
Restart the cooking cycle once power is back.
Check the breaker for the rangetop if the rest of the home kept its power.
Book a visit if ER04 appears with no power interruption at all.
Cleared?
The cooktop came right without a new part. If the same message returns while a zone or burner is on, or the top shuts itself down again mid-meal, treat it as a fresh problem and book it.
What not to do
ER04 is not a failure of the burner; it records a power interruption. It records that main power was lost during a cooking cycle.
What you may
notice with it.
The cooktop problems ER04 tends to arrive with. Answer these at the cooktop before anyone is booked.
All problems
Cooktop Burner Won't Light
6 causes, cheapest first
No repair indicated
Nothing to repair.
A state the cooktop was put in, or one it picked deliberately — a child lock, a demo mode that lights the keys but heats nothing, a residual-heat letter over a zone that is still warm, a prompt that no pan has been found. Nothing has broken and no part is called for.
Hestan
cooktops.
A California maker of pro-style gas cooking, with rangetops for the home kitchen.
Hestan cooktop repairMore Hestan codes
Mode, not a failure on other makes
Induction cooktop
A glass cooktop in the counter that heats the pan itself through magnetic coils, run by power boards and cooled by a fan underneath.
Rangetop
A pro-style gas cooking top with its knobs across the front, set into a notch above a base cabinet, often with a griddle or char-broiler beside the burners.
In Hestan's own words
ER04 - Power loss during cooking cycle
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Hestan KRTS smart rangetop, Smart Burner only; the KRTS is not in Hestan's 2026 indoor catalog. KRT rangetops without the Smart Burner show no ER codes.
Hestan ER04 cooktop repair,
where we come out.
The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about ER04.
Can I clear ER04 myself?
Why did my Hestan Smart Burner show ER04 after a storm?
Should I book a visit for ER04?
Does ER04 on a Hestan KRTS Smart Burner mean the rangetop lost power?
Back to your everyday
Still showing ER04?
Book with the code copied exactly, the full model number, and whether there is any smell of gas or burning — with a code in hand, that is where the diagnosis starts.