Heller Reflow Oven Fan Noise

We acquired a Heller 1809 MKIII and the fan on the bottom side of zone one makes a high pitched hum while the oven is at room temp. Once the oven starts to heat up, the noise goes away. The bearings were in bad shape, so we replaced those but it didn't fix the problem. We have found that if we lower the fan slightly, the noise goes away too but cant find anything that is interfering with the fan. Does anyone have any ideas?

Visit SMT Electronics Manufacturing Forums >

Make your company listing and your company website a priority for over 30 k / monthly searches performed at SMTnet.com

See all benefits > 

I.C.T ( Dongguan ICT Technology Co., Ltd. ) - I.C.T is a manufacturer from China that offers SMT, DIP, PCBA conformal coating equipment and turnkey solution.

SCAN SMT - SCANSMT is local stocking dealer who major in SAMSUNG,PANASONIC,YAMAHA,JUKI,FUJI mounter and MIRTEC,KOHYOUNG,PARMI,PEMTRON,CYBEROPTICS AOI&SPI,MPM,SJ,ESE Printers.HELLER,TSM Reflows are always have invertonries.welcome to visit us

Heller 公司 - 全球回流焊市场领导者

Become a Power Member >

SG Physics Tuition - SG Physics Tuition Center provides physics tuition for learners in Singapore. Students can get numerous benefits by taking tuition from SG Physics.

Circle Exhibit - Circle Exhibit has over a decade of experience in exhibition services and has successfully helped thousands of businesses build and provide booth services in the exhibition capital.Meanwhile, Circle Exhibit specializes in providin

PCB Trace Technologies - PCB Trace Technologies is a leading Printed Circuit Boards Manufacturer in USA, We have a team of engineers that provides expert and extensive range of PCB solutions in the most affordable rates.

List your company in the Industry Directory > 

Browse listings for new and used smt, pcb assembly equipment for sale and wanted.

Marketplace is sponsored by:

Juki KE750 SMT machine

DONGGUAN KINGSUN AUTOMATION TECHNOLOGY CO.,LTD

ETA E10

I.C.T ( Dongguan ICT Technology Co., Ltd. )

SEHO Selectline C

Petlock Incorporated

List your SMT & PCB Equipment >

Latest PCB News / EMS News Stories

News Releases are sponsored by:

SHENMAO Launches High-Performance Jet Dispensing Solder Paste

Shenmao Technology Inc.

Europlacer Puts Intelligent, Connected Production in the Spotlight at Southern Manufacturing

3M Electrical Solutions Division

Transition Automation to Showcase Recently Patented Soft-TouchTM Paste Retainers at IPC APEX 2026

Transition Automation, Inc.

Post your Electronics Manufacturing News >

Papers and articles related to SMT, PCB & EMS industry.

Technical Library is sponsored by:

Swedish Innovation Meets Indian Manufacturing Excellence

INDIC Electronics

India's EMS Market: A Beacon of Opportunity

INDIC Electronics

Indic Delivers Quality To Global Lighting Customer

INDIC Electronics

Make a submission to the Technical Library >