This article covers how to replace the grill temperature sensor in a Z Grills 700 series pellet smoker.
For Grill Models: 7002B, 700E, 700E-XL
Time: 5 – 10 minutes
Spare Parts (from Z Grills): Grill Temperature Sensor
Tools Required: Phillips head screwdriver
What is the grill temperature sensor?
The grill temperature sensor is located on the inside left of the grill and measures the temperature inside the grill. Based on this reading the controller modulates the fan speed (air flow into the fire-pot) and auger motor operation (delivery of wood pellets) to reach and maintain the target temperature.
The sensor only measures temperature in the tip of the vertical metal probe. When sliding in and out the grill rack and grease tray be careful not to knock the probe as it can be damaged.
Identifying a faulty temperature sensor
The following may indicate a faulty temperature sensor:
- HEr (high temperature) errors occuring when the grill is NOT at very high temperatures.
- Temperature readings that are significantly higher or lower than the actual measured temperature inside the grill area.
A good way to check if the temperature sensor is getting an accurate reading is to position one of the food temperature probes alongside the temperature sensor with the tips at the same level. With the grill running and the lid closed, compare the temperature reading on the controller display (grill temperature) with the P1 or P2 food probe temperatures. These should be within 5ºC of each other.
700 series grills have a plug in the temperature sensor cable which makes replacement very fast and easy.
The plug is located in the cable tucked down between the hopper and grill drum.
The other end of the sensor cable it connected into a small green or blue terminal block on the controller circuit board. Unless there is damage to the controller side of the cable, the controller does not need to be accessed during the temperature sensor replacement process.
Check out the video below and the step by step instructions with photos on this page to understand how to replace a grill temperature sensor on a 700 series Z Grill.
Step 1. Unplug the Power
Before doing any maintenance or cleaning, always unplug the power to the grill.
Step 2. Empty the Grill
Remove the grill racks and grease tray to get clear access to the grill temperature sensor.
Step 3. Unplug cable
Pull out the temperature sensor cable that is tucked down between the hopper and grill drum.
Press on the little lever and unplug the connector.
Step 4. Remove screws
Remove the two screws at the base of the temperature sensor.
Some grills have a nut underneath that you will have to hold with your fingers or a pair of pliers to fully remove the screw.
Step 5. Pull Cable Out
There is a small hole in the side of the drum that the cable passes through.
As you pull the cable through the plug end will often get stuck and need to be slightly rotated to pull through the hole.
Step 6. Install new sensor
Reverse the process to install the new temperature sensor.
Make sure you orientate the sensor the correct way so there is a clearance from the side of the drum.
Plug the cables back together, bundle up neatly and tuck down down between the hopper and grill drum.