Please excuse me, I am an electronics beginner.
I built a kit circuit "kemo b048" which is a temperature activated relay.
I bridged the + to one of the relay contact points and ground to the other, so that when the relay activates it also closes the switch between +12v which puts current across the relay switch and then back to the ground in the circuit to power a fan.
When the relay activates, it stutters for a moment. A strong temperature change has a min stutter, but a minor temperature change has a long stutter.
I am guessing that when the fan activates it causes a minor voltage drop in the circuit which interferes with the circuit.
I am also guessing that a well placed capacitor might relsolve this issue. I know that often a capacity is placed parallel to the motor to reduce interference however I am unsure if it will assist in this situation. I understand that the capacitor in parallel reduces noise caused by the contact of the brushes but will it also assist with the initial load of powering the fan also?