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Replace Side Fan

A project log for T-962A Reflow Oven Modifications

Modifications to a T-962A reflow oven which turn this cheap oven to a surprisingly effective piece of hardware.

LanceLance 10/07/2020 at 21:160 Comments

Introduction

The side fan is very noisy and runs whenever the unit is on.  An equivalent fan can be substituted  that is virtually silent.

Original Fan

I tracked down the specifications of the original fan.  The details, for reference, are below.  It's possible your fan is a different model, but the specs should be pretty much the same.

New Fan

The fan I selected is a Sunon Fans model 4129/HA40201V4-1000U-A99.  It is similar to the original with a few important differences.

In selecting this fan, I sacrificed a little CFM to get the quietest fan I could.   This fan is nearly perfectly quiet.  If I had to do it over again, I would try to get a little more airflow even at the expense of a little more noise.

Installation

The installation is easy enough, but there are two things you should be aware of.

Bolts

If you select a 20mm deep fan instead of a 15mm (like the original) it will fit, but you do need to replace the original screws with longer ones.  You will need 4 M4x30mm (0.7mm pitch) screws.

Fan Connector

Likely your new fan will come with a connector different than the one on  the existing fan (or it won't be long enough).  I chose to cut the old connector off and use it for the new fan.

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