I have just repaired one of these and found Colin's answer above very helpful in getting the connections right. The one I did was wired slightly differently as follows and also works:-
Positive mains to microswitch 1, microswitch 2 connected together with motor 1, red bulb 1, halogen 1, green bulb 1.
Neutral mains to timer 1, timer 2 connected together with motor 2, red bulb 2, thermostat 1.
Connect together thermostat 2, halogen 2, green bulb 2.
Both ways work, depending on how the original was wired.
Ian Donald
June 2019