- Help Center
- LUCCA A53 (Direct Plumb & Mini) by La Spaziale
- Brew Boiler Maintenance
-
Getting Started
-
Espresso 101
-
Warranty, Ordering & Returns
-
Bezzera BZ10
-
Bezzera Duo DE
-
Bezzera Duo MN
-
LUCCA A53 (Direct Plumb & Mini) by La Spaziale
-
LUCCA M58 by Quick Mill
-
LUCCA S58 by Profitec
-
LUCCA X58 by Quick Mill
-
La Marzocco Linea Mini
-
La Marzocco GS3
-
Lelit Bianca
-
Lelit Elizabeth
-
Lelit Victoria
-
ECM Synchronika
-
ECM Special Edition Classika PID
-
ECM Mechanika V Slim
-
ECM Casa V
-
ECM Puristika
-
Profitec Pro 300
-
Profitec Pro 400
-
Profitec Pro 500
-
Profitec Pro 600
-
Profitec Pro 700
-
Profitec Pro 800
-
Rocket Appartamento
-
Rocket R58 / Cinquantotto
-
Rocket Giotto
-
Rocket R Nine One
-
La Spaziale S2 EK
-
Rancilio Silvia
-
Rancilio Silvia Pro
-
Rancilio Silvia Pro X
-
Izzo Alex Duetto
-
Quick Mill
-
Breville Oracle
-
Dalla Corte Mina
-
Slayer
-
Lucca Grinders
-
Baratza Grinders
-
LUCCA Atom 75
-
Eureka Grinders
-
ECM Grinders
-
Compak Grinders
-
Fellow ODE Grinder
-
Mahlkonig Grinders
-
Profitec Grinders
-
Breville Grinders
-
Dalla Corte Grinders
-
Macap Grinders
-
Fiorenzato Grinders
-
General Troubleshooting
-
Like New & Trade-In Program
-
Eureka Mignon Libra
-
Eureka Mignon Libra User Manual
-
Rocket Boxer Setup Guide
-
Rocket Boxer Timer User Manual
-
Baratza Encore ESP Setup Guide
-
Baratza Encore ESP User Manual
-
Fellow Opus User Manual
-
Fellow Opus Setup Guide
LUCCA A53 / Mini / Vivaldi: Testing the Coffee Boiler Temperature Probe
If your Lucca A53 fails to heat properly, trips the GFCI on start-up, or displays the "120-ECO" or "97-ECO" error code, there may be a fault with the coffee boiler temperature probe. Follow these instructions to test the probe with a multimeter.
Tools Needed:- Multimeter
- Clip-style multimeter leads
- Pick or similar implement
- Wire snips or scissors
1. Identify the coffee boiler temperature probe.

2. Snip the zip tie holding the temperature probe leads together. Pull back the insulators and separate the electrical connections.


3. Use a pick or similar implement (a small screwdriver works well) to remove the silicone plug that holds the temperature probe in place, then pull the probe from the machine.

4. Set your multimeter to the resistance setting (Ω) and set the range to the 20M setting. Touch the multimeter probes to the temperature probe leads or attach the multimeter clips.

The temperature probe acts as a variable resistor, with the resistance value changing inversely in response to changes in ambient temperature. The resistance value decreases as the temperature of the probe increases and vice versa. At roughly room temperature the probe should display a resistance of between 200kΩ and 300kΩ (or 0.20MΩ to 0.30MΩ).
5. Warm the resistor up in your hand, while keeping an eye on the multimeter display. You should see the resistance value start to drop almost immediately as the probe warms up. Look for a steady decrease. Let go of the multimeter and watch as the resistance value climbs back up as the probe cools down.


If your multimeter displays 0 resistance or infinite resistance (O.L.), the temperature probe is most likely faulty. If the temperature probe does not consistently respond to changes in temperature that is also an indication that it's likely faulty.
NOTE: LUCCA A53 / Vivaldi: Replacing Coffee Boiler Temperature Probe