How to read amperage on the load side of the Easystat.
To perform this test, the thermostat unit should be connected to house power (120 or 240 as appropriate for the heating system installed) as well as be connected to the floor heating system. This wiring off the back side of the thermostat should be exposed (not in the wall) in order to perform this test. With the faceplate secured and the unit turned on, press the UP arrow buttons to 100 F ( 36 C). 5 flame icons should also appear on the screen within 20-25 seconds. The flame icons indicate that the thermostat unit is allowing current to pass to the load side (floor system) and an amperage draw can now be measured.
Please review the instructions for your particular multimeter on how to measure amperage. Some meters will require that they be in-line with the circuit to obtain a reading, while some meters are equipped with a large clamp to encircle the load wires. Either variety will work for this test. As always, exercise extreme caution when performing these tests. High voltage is involved in this test.