Did a search and did not see anything that fit what I am seeing.

Situation:

134 conversion was done when I bought the car. Fan motor and fan speed select switch replaced. System charged. Took approx. 2 cans of refrigerant.

A/C blows cold for the first minute or so and then cycles between cold and hot at about 15 second intervals.

Any ideas what the problem could be?

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89 190E
2.6L
Arctic white
Grey leather
Sunroof
Pirelli P400 rubber
Smoked corners