Exhibit 35  a) CHASE logo] SUBSERVICER COMPLIANCE STATEMENT  RE: CSFB HEAT 2006-4: The Pooling and Servicing Agreement by and among DLJ Mortgage  Capital, Inc. as Seller, U.S. Bank National Association as Trustee, Select Portfolio Servicing,  Inc. as Special Servicer, Select Portfolio Servicing, Inc as Servicer, Wells Fargo, National  Association as Servicer, Wells Fargo Bank, National Association as Custodian, LaSalle Bank  National Association as Custodian, J.P. Morgan Trust Company, N.A. as Custodian, Clayton  Fixed Income Services as Credit Risk Manager, Credit Suisse First Boston Mortgage Securities  Corp. as Depositor and JPMorgan Chase Bank NA as Servicer (the "Agreement")  The undersigned, each a duly authorized officer of Chase Home Finance LLC ("CHF"), do hereby certify that:  (1) CHF is a Subservicer under the Agreement  (2) A review of the activities of CHF during the calendar year ending December 31, 2006 and of the performance of CHF under the Agreement has been made under our supervision; and  (3) To the best of our knowledge, based on such review, CHF has fulfilled all its obligations under the Agreement in all material respects throughout such year.  Capitalized terms used but not defined herein shall have the meanings assigned in the Agreement.  Date: 02/28/2007  Chase Home Finance LLC,  as Subservicer  By: /s/ Kim Greaves Name: Kim Greaves  Title: Senior Vice President  Servicing Manager By: /s/ Jim Miller Name: Jim Miller Title: Senior Vice President  Default Servicing Manager  Exhibit 35  b) [CHASE logo] SERVICER COMPLIANCE STATEMENT  RE: CSFB HEAT 2006-4: The Pooling and Servicing Agreement by and among DLJ  Mortgage Capital, Inc. as Seller, U.S. Bank National Association as Trustee, Select  Portfolio Servicing, Inc. as Special Servicer, JPMorgan Chase Bank, NA c/o CHF  LLC as Servicer, Select Portfolio Servicing, Inc as Servicer, Wells Fargo, National  Association as Servicer, Wells Fargo Bank, National Association as Custodian,  LaSalle Bank National Association as Custodian, J.P. Morgan Trust Company,  NA. as Custodian, Clayton Fixed Income Services as Credit Risk Manager, Credit  Suisse First Boston Mortgage Securities Corp. as Depositor and JPMorgan Chase  Bank NA as Servicer (the "Agreement")  The undersigned, a duly authorized officer of JPMorgan Chase Bank, National Association, as servicer (the "Servicer") pursuant to the CSFB HEAT 2006-4 (The "Agreement"), does hereby certify that:  (1) A review of the activities of the Servicer during the calendar year ending December 31, 2006 and of the performance of the Servicer under the Agreement has been made under my supervision; and  (2) To the best of my knowledge, based on such review, the Servicer has fulfilled all its obligations under the Agreement in all material respects throughout such year.  Date: 02/28/2007  JPMorgan Chase Bank,  National Association,  as Servicer  By: /s/ David Lowman Name: David Lowman  Title: Executive Vice President  Exhibit 35  c) SPS LOGO Agreement:     See Schedule of Agreements Dated: See Attached Schedule ANNUAL STATEMENT AS TO COMPLIANCE In accordance with the applicable section in each of the Pooling and Servicing Agreements specified: i. a review of the activities of the Servicer during the year ended December 31, 2006 and of performance under this Agreement has been made under such officers' supervision; and ii. to the best of such officers' knowledge, based on such review, the Servicer has fulfilled all of its obligations and no default has occurred under this Agreement throughout such year. February 24, 2007 /s/ Matthew L. Hollingsworth Matthew L. Hollingsworth Chief Executive Officer  Select Portfolio Servicing, Inc. Credit Suisse First Boston Mortgage Securities Corp., Depositor, DLJ Mortgage Capital, Inc., Seller, Wells Fargo Bank, N.A., Servicer, JPMorgan Chase Bank, National Association, Servicer, Select Portfolio Servicing, Inc., Servicer and Special Servicer, Clayton Fixed Income Services Inc., Credit Risk Manager and U.S. Bank National Association, Trustee - Pooling And Servicing Agreement - Home Equity Asset Trust 2006-4 4/1/2006 Exhibit 35  d)  [WELLS FARGO HOME MORTGAGE logo} Wells Fargo Home Mortgage One Home Campus Des Moines, IA 50328-0001 Wells Fargo Bank, N.A. Servicer Compliance Statement 1. I, John B. Brown, Senior Vice President of Wells Fargo Bank, N.A. ("Wells Fargo") hereby state that a review of the servicing activities of Wells Fargo during the calendar year 2006 and of Wells Fargo's performance under the servicing agreement(s) listed on the attached Exhibit A (the "Servicing Agreement(s)") has been made under my supervision.  2. To the best of my knowledge, based on such review, Wells Fargo has fulfilled all of its obligations under the Servicing Agreement(s) in all material respects throughout 2006.  By: /s/ John B. Brown John B. Brown Senior Vice President Wells Fargo Bank, N.A. March 1, 2007 **EXHIBIT A - No Exceptions************CLIENT****INV#****INV****MASTER****SERVICER/****TRUSTEE****DEAL NAME**106 504 CSMC US BANK  HEAT 2004-6 106 512 CSMC US BANK  HEAT 2004-AA1 106 L61 CSMC US BANK  CSFB HEAT 2003-7 106 L63 CSMC US BANK  CSFB HEAT 2003-8 106 L71 CSMC US BANK  CSFB HEAT 2003-5 106 L83 CSMC US BANK  CSFB HEAT 2004-3 106 413 CSMC US BANK  HEAT 2006-5 106 414 CSMC US BANK  HEAT 2006-6 106 415 CSMC US BANK  HEAT 2006-7 106 417 CSMC US BANK  HEAT 2006-8 106 581 CSMC US BANK  HEAT 2006-8 708 333 CSMC US BANK  HEAT 2006-1 708 334 CSMC US BANK  CSFB HEAT 2005-7 708 335 CSMC US BANK  CSFB HEAT 2005-8 PREFUNDI 708 336 CSMC US BANK  HEAT 2006-2 708 337 CSMC US BANK  HEAT 2006-3 708 338 CSMC US BANK  HEAT 2006-4 708 365 CSMC US BANK  HEAT 2006-5 708 465 GOLDMAN SACHS US BANK * 708 484 GOLDMAN SACHS US BANK * Exhibit 35  e) [WELLS FARGO HOME MORTGAGE logo} Wells Fargo Home Mortgage One Home Campus Des Moines, IA 50328-0001 Wells Fargo Bank, N.A. Servicer Compliance Statement 1. I, John B. Brown, Senior Vice President of Wells Fargo Bank, N.A. ("Wells Fargo") hereby state that a review of the activities of Wells Fargo during the calendar year 2006 and of Wells Fargo's performance under the servicing agreement(s) listed on the attached Exhibit A (the "Servicing Agreement(s)") has been made under my supervision.  2. To the best of my knowledge, based on such review, Wells Fargo has fulfilled all of its obligations under the Servicing Agreement(s) in all material respects throughout 2006, with the exception of the following failure(s) to fulfill any such obligation in any material respect: For certain loans sub-serviced by Wells Fargo or for which servicing rights were acquired on a bulk-acquisition basis, Wells Fargo determined that it provided incomplete data to some third parties who use such data to calculate delinquency ratios and the status of loans with respect to bankruptcy, foreclosure or real estate owned.  The incomplete reporting only affected securitizations that included delinquent loans.  Instead of the actual due date being provided for use in calculating delinquencies, the date of the first payment due to the security was provided.  Wells Fargo subsequently included additional data in monthly remittance reports, providing the actual borrower due date and unpaid principal balance, together with instructions to use these new fields if such monthly remittance reports are used to calculate delinquency ratios. By: /s/ John B. Brown John B. Brown Senior Vice President Wells Fargo Bank, N.A. March 1, 2007 **EXHIBIT A - Exceptions****INV#****INV****MASTER****SERVICER/****TRUSTEE**386 CSMC PMSR HEAT PMSR 06-4 US Bank 507 CS SUB HEAT 2004-7 US Bank 516 CS SUB HEAT 2004-8 US Bank 521 CS SUB HEAT 2005-1 US Bank 527 CS SUB HEAT 2005-2 US Bank 532 CS SUB HEAT 2005-3 US Bank 538 CS SUB HEAT 2005-4 US Bank 541 CS SUB HEAT 2005-5 US Bank 545 CS SUB HEAT 2005-6 US Bank 549 CS SUB HEAT 2005-7 US Bank 552 CS SUB HEAT 2005-8 US Bank 555 CS SUB HEAT 2005-9 US Bank 559 CS SUB HEAT 2006-1 US Bank 561 CSMC SUB HEAT 2006-2 US Bank 563 CSMC SUB HEAT 2006-3 US Bank 567 CSMC SUB HEAT 2006-4 US Bank 570 CSMC SUB HEAT 2006-5 US Bank 573 CSMC SUB HEAT 2006-6 US Bank 576 CSMC SUB HEAT 2006-7 (9/06) US Bank L74 CS SUB HEAT 2004-1 US Bank L78 CS SUB HEAT 2004-2 US Bank L84 CS SUB HEAT 2004-4 US Bank L87 CS SUB HEAT 2004-5 US Bank Q03 WACHOVIA PMSR 2006-AMN1 US Bank