Wis. Admin. Code § ATCP 136.16
(1) Disclosure required. No person may repair or service a mobile air conditioner or trailer refrigeration equipment unless that person first discloses all of the following to the person requesting that repair or service:
(b) If a mobile air conditioner or trailer refrigeration equipment leaks refrigerant, that mobile air conditioner or trailer refrigeration equipment may not be recharged until the leak is repaired.
Note: Under ch. ATCP 132, Wis. Adm. Code, a motor vehicle repair shop may not diagnose a problem in a motor vehicle, or repair or service that motor vehicle, without the customer’s prior authorization. This chapter does not change ch. ATCP 132.
(3) Recovering refrigerant. A person who removes refrigerant from a mobile air conditioner or trailer refrigeration equipment shall do both of the following using equipment approved by the department under s. ATCP 136.12:
(4) Substituting refrigerant. A person who charges a mobile air conditioner or trailer refrigeration equipment with a type of refrigerant not originally used in that mobile air conditioner or trailer refrigeration equipment shall do all the following:
(a) Affix to the air conditioner or equipment a prominent label that identifies all the following:
(5) Repair or service records. A technician shall keep a record of each repair or service transaction. The record shall include the name and address of the owner of the mobile air conditioner or trailer refrigeration equipment. The record shall indicate all of the following:
(b) Whether the person receiving the mobile air conditioner or trailer refrigeration equipment for repair or servicing did any of the following:
3. Added refrigerant to the mobile air conditioner or trailer refrigeration equipment. The record shall indicate the quantity added, if any.
Note: A motor vehicle repair order or invoice prepared under ch. ATCP 132, complies with sub. (5) if it contains all of the information required under sub. (5).
History: Cr. Register, February, 1996, No. 482, eff. 3-1-96; am. (4) (intro.), r. and recr., (4) (a) to (c), Register, January, 2001, No. 541, eff. 2-1-01; CR 15-015: am. (4) (a) 3., (5) (intro.) Register January 2016 No. 721, eff. 2-1-16.