{"nhtsa_id":10109751,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-02","date":"2014-08-11","document_id":"PS338","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER","mfr_system":null,"summary":"PITSTOP: HEATER BLOWING COLD AIR WHILE IN EV MODE - When diagnosing a concern related to the heater intermittently blowing cold air while in EV mode, check the Electric Water Pump (EWP) for the A/C system (NOT the main cooling system EWP), located on the rear of the transmission (A), for proper operation. To test EWP operation, disconnect connector CHG31/C131 (B) and apply power and ground to the EWP.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10109751-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10109751-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10109751","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"OPTIMA HYBRID","year_from":2011,"year_to":2015,"match":"base","vehicle_ids":["2011_kia_optima","2012_kia_optima","2013_kia_optima","2014_kia_optima","2015_kia_optima"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}