Dishwasher ER Error Code: Heating and Control Board Fix

Quick Answer

The ER code usually signals a heating failure or a control board glitch. Start by flipping the circuit breaker off for ten minutes to reset the electronics. If the code returns, you likely have a burnt-out heating element or a faulty thermistor sensor that needs testing with a multimeter.

Look, nine times out of ten when I pull up to an ER code call I already know what I'm walking into. Machine timed out trying to heat the water and gave up. Ignore it and you're basically running cold dirty water over your dishes for an hour and accomplishing nothing. Usually it's a busted heating element or a wiggled-loose wire, not some massive electronic meltdown. Fix is usually under $60 if you catch it early.

GenericDishwasherSeverity: highDifficulty: intermediate85% DIY Success

Time to Fix

45–90 min

Difficulty

intermediate

Parts Cost

$15 – $85

Tools Needed

Digital multimeter (with ohms and continuity setting), Phillips #2 screwdriver

What Does the ER Code Mean?

So the ER code is basically your dishwasher throwing its hands up. Something in the heating loop isn't behaving the way the control board expects, either the water temp isn't climbing fast enough or the board's getting a weird signal from the thermistor. Honestly it's more common than you'd think, and most of the time the fix is under $50 if you're doing it yourself.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Heating element failure45%

Thermistor/Sensor fault25%

Main control board relay failure20%

Wiring harness issues10%

Symptoms You May Notice

ER code shows up right around the 20-30 minute mark when the heating phase kicks in and the whole machine just stops cold.
Dishes come out room temperature and dripping wet, like the machine just circulated cold water for 45 minutes and called it a wash.
Machine fills with water, runs for maybe 60 seconds, then immediately drains and throws the code before the cycle even really starts.
Code appears the instant you hit power, before the machine even tries to fill, which usually points to a control board issue rather than a heater.
You can hear the motor running normally but there's no warmth coming off the door and the cycle just keeps going and going without ever finishing.

Can you reset a Generic dishwasher to clear the ER code?

Hold the Start or Cancel button for five full seconds until the display goes blank or flashes. On some models the lights will cycle before they clear. If that doesn't work, go to the breaker and cut power for ten minutes. When power comes back the processor reboots and runs a self-check on the heating circuit. If the underlying problem's actually fixed, the code won't come back.

Tools Required for Diagnosis

Digital multimeter (with ohms and continuity setting)Phillips #2 screwdriver1/4-inch nut driverNeedle-nose pliersFlat-head screwdriver (for prying wire clips)Cut-resistant work gloves

Service / Diagnostic Mode

Press 'Power' then 'Normal' and 'Heated Dry' simultaneously twice within five seconds.

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test

Expected Range10–30 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Heating ElementGeneric High-Wattage Element · $35–$85	Generic High-Wattage Element	$35 – $85
Thermistor (Temp Sensor)Universal NTC Sensor · $15–$40	Universal NTC Sensor	$15 – $40

Frequently Asked Questions

Can I run the dishwasher with the ER code showing?

I wouldn't. Most machines lock out completely when ER's active as a safety thing. And even if you could somehow bypass it, the heater's not working, so your dishes aren't getting sanitized and grease isn't breaking down the way it should. You're basically just splashing cold water around for 45 minutes. Fix the heating issue first, it's not worth the mess.

Why does the ER code only happen sometimes?

Intermittent codes are almost always a loose wire connection or a relay that's starting to fail but hasn't fully quit yet. As the machine vibrates during a cycle, a loose spade connector on the heater can lose contact for a split second and that's enough to trip the error. I always start with the wire nuts at the junction box and the heater terminal connections for anything intermittent. Check those before you assume it's the board.

Is it worth replacing the control board for an ER code?

Depends on the age of the machine. Under 7 years old, a new board's usually worth it. But if you're looking at a 12-year-old dishwasher that needs a $200 board plus a couple hours of labor, that math doesn't work out great. Always test the heater first because that's a $30 fix, not a $300 fix. A lot of techs jump straight to board replacement without even checking the heater first, which honestly drives me crazy.

Does the ER code mean my dishwasher is leaking?

Usually no. ER's tied to the electrical and heating systems, not water level. A leak would typically throw a different code, like LE or AE depending on your brand. That said, if water's been dripping onto the heater terminals under the tub, it can cause a short that triggers ER. So while it's not a leak code, it's always worth peeking under there for moisture when you've got the kickplate off anyway.

How much should I expect to pay to fix an ER code?

If it's the heating element, you're looking at $20-60 for the part and maybe 30 minutes of your time if you're doing it yourself. Thermistor's even cheaper, $15-25. Control board's where it gets expensive, those run $100-250 for the part alone. Hiring a tech? Figure $150-300 for a heater repair with labor. Board replacement with labor can run $300-450. On a newer machine that's worth it. On something 10+ years old, I'd honestly think hard before sinking that kind of money in.

Related Generic Dishwasher Error Codes

Code: HELG Dishwasher HE Error: Heater Circuit Failure Code: HCSamsung Dishwasher HC Error: High Temp Heating Check

Same Fix on Other Brands

Whirlpool dishwasher7-1: Whirlpool 7-1 Error: Heating Element Fault

Models Known to Experience ER Errors

This repair applies to most Generic dishwashers with this error code. Common model numbers include:

LDF7551ST, LDF7774ST, LDF8072ST, LDF8874ST, LDT9965BD, GSD3300, WDT730PAHZ, DW80K5050

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026