SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    Form 8-K

                Current Report Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): September 2, 2003



                               THERMOGENESIS CORP.
             (Exact name of registrant as specified in its charter)

          Delaware                    0-16375                 94-3018487
          --------                    -------                 ----------
(State or other jurisdiction        (Commission            (I.R.S. Employer
      of incorporation              File Number)          Identification No.)
      or organization)


                                2711 Citrus Road
                        Rancho Cordova, California 95742
                                 (916) 858-5100
          (Address and telephone number of principal executive offices)




<PAGE>


Item 5. Other Events and Regulation FD Disclosure.

     ThermoGenesis  Corp.  (the  "Company") has accepted the  resignation of Sam
Acosta, who served as Vice President of Manufacturing  Operations since December
1997.  Mr.  Acosta,  whose  contract  would have expired in December  2003,  has
departed as of September 2, 2003 to pursue other business interests. The Company
is currently  working on a plan of transition.  As part of that transition,  the
Company is  refining  its  operating  structure  for greater  efficiency,  which
includes  the  elimination  of the position of Vice  President of  Manufacturing
Operations.  Mr. Acosta's former duties will be distributed  among other current
members of the Company's operations team.







<PAGE>


                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                              THERMOGENESIS CORP.,
                                              a Delaware corporation


Dated:  September 9, 2003                     /s/Renee M. Ruecker
                                              ----------------------------------
                                              Renee M. Ruecker,
                                              Chief Financial Officer
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{"company-data": {"conformed-name": "THERMOGENESIS CORP", "cik": "0000811212", "assigned-sic": "3821", "irs-number": "943018487", "state-of-incorporation": "DE", "fiscal-year-end": "0630"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-82900", "film-number": "03891651"}, "business-address": {"street1": "3146 GOLD CAMP DRIVE", "city": "RANCHO CORDOVA", "state": "CA", "zip": "95670", "phone": "9168585100"}, "mail-address": {"street1": "3146 GOLD CAMP DRIVE", "city": "RANCHO CORDOVA", "state": "CA", "zip": "95670"}, "former-company": {"former-conformed-name": "INSTA COOL INC OF NORTH AMERICA", "date-changed": "19920703"}}
SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    Form 8-K

                Current Report Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): September 2, 2003

                               THERMOGENESIS CORP.
             (Exact name of registrant as specified in its charter)

          Delaware                    0-16375                 94-3018487
          --------                    -------                 ----------
(State or other jurisdiction        (Commission            (I.R.S. Employer
      of incorporation              File Number)          Identification No.)
      or organization)

                                2711 Citrus Road
                        Rancho Cordova, California 95742
                                 (916) 858-5100
          (Address and telephone number of principal executive offices)
Item 5. Other Events and Regulation FD Disclosure.

     ThermoGenesis  Corp.  (the  "Company") has accepted the  resignation of Sam
Acosta, who served as Vice President of Manufacturing  Operations since December
1997.  Mr.  Acosta,  whose  contract  would have expired in December  2003,  has
departed as of September 2, 2003 to pursue other business interests. The Company
is currently  working on a plan of transition.  As part of that transition,  the
Company is  refining  its  operating  structure  for greater  efficiency,  which
includes  the  elimination  of the position of Vice  President of  Manufacturing
Operations.  Mr. Acosta's former duties will be distributed  among other current
members of the Company's operations team.
SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                              THERMOGENESIS CORP.,
                                              a Delaware corporation

Dated:  September 9, 2003                     /s/Renee M. Ruecker
                                              ----------------------------------
                                              Renee M. Ruecker,
                                              Chief Financial Officer