Given the current rating that is generally shown on these units, I'd rather come to the conclusion that they were both thermostatically controlled relays.
I've had reason to revise my thoughts that both would be in the fan circuit, however.
From the descriptions online the red dot one appears to be an oven safety cut-out, which should normally be closed circuit, but will trip (go open circuit) in overheat mode.
The blue dot one is the (only) fan control thermostat/relay, and will be open-circuit when cold, will close as the back of the oven heats up, and then will go open-circuit again once it cools. (off/on/off)
If it works like this (and web research indicates it's likely) then no other control is required.
If you have a meter, you could check for open-circuit when cold via lack of continuity across the terminals (without turning the oven on), or else, but very carefully, remove one of the terminal connections, insulate/isolate it, and try with the oven on. If the fan still runs, there is an issue somewhere else, if it doesn't then it looks like a duff replacement thermostat/relay.
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