Hot-air rework station — Weller WHA 900

Saved standby can start heating as soon as it's switched on — keep the handpiece in its rest and assume it's hot.

Hot-air station for SMD soldering and component removal. Turquoise unit on the bench shelf, beside the SolderPeak desoldering station.

Weller WHA 900 and handpiece

Weller WHA 900 and handpiece




Location

Electronics room

Access

Free use

Temperature

50–550 °C

Airflow

~5–50 l/min

Controls

Control

Function

Temperature knob

50–550 °C

Air knob

Airflow

Green Start/Stop

Starts/stops hot air (slow flash = idle, fast flash = running)

Rocker switch

Mains power

The dial temperature isn't the joint temperature — that depends on nozzle, airflow, distance and board.

How to use

  1. Board unpowered, batteries out, on a heat-proof surface. Clear loose wires and paper. Tweezers ready. Fume extractor on.

  2. Handpiece in its rest. Set temperature and airflow, switch on.

  3. Press green Start/Stop for hot air.

  4. Heat evenly. Enough air for the joint, not so much that small parts blow away. Only lift a part once the solder has melted.

  5. Stop, handpiece back in its rest, switch off. Let everything cool.

Practise on scrap before a valuable repair. Change nozzles only when cool (clamping screw).

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