How about rectifying the current through the coil?................. You could use Schottky diodes.

The first batch of CTs I used saturate at 500mV. At 60hz you cannot get more that 0.5V out of the CT at any current.
The larger ones I got saturate at about 1V. Will not light an LED but will turn on the B-E junction of a transistor if wired across the transistor. I could not make it work if I used a diode and transistor in series.
I have found lager yet parts that will light a 1.5V red LED. By now it became better to get a Shelly PM.

 

The first batch of CTs I used saturate at 500mV. At 60hz you cannot get more that 0.5V out of the CT at any current.
The larger ones I got saturate at about 1V. Will not light an LED but will turn on the B-E junction of a transistor if wired across the transistor. I could not make it work if I used a diode and transistor in series.
I have found lager yet parts that will light a 1.5V red LED. By now it became better to get a Shelly PM.

No - sorry - I was still thinking about the reed switch.

 

How about rectifying the current through the coil? I don't know how much current your freezer uses, and whether the voltage drop across a bridge would create too much heat for it to be viable. You could use Schottky diodes.

How will that help?
Coils don't work with DC.

 

How will that help?
Coils don't work with DC.

Same as a reed relay.

 

Same as a reed relay.

Not for a CT which works only on AC.

 

Not for a CT which works only on AC.

I didn't mention current transformers. This post is about reed switches,

 

This circuit works with tiny little current transformers- provides a nice DC voltage output

 

Back in my post #6 I mentioned one of these. Digging around I found one I had. I likely will never use the one I found so if you want it just shoot me a PM and I will mail it to you. I think I have a few more somewhere. Postage on me.

Ron