FREQUENTLY ASKED QUESTIONS

Occasionally customers may encounter issues using out heat tools, and we’ve compiled answers to some of the most common questions. If you continue to experience issues or can’t find a relevant answer, contact your local distributor or SF Tools™ directly at 603.863.7719 or via email at info@SFTools.com.

Tool will not fire.

Trigger will not depress fully.
Depress trigger all the way until igniter fires with a click
Trigger activated too quickly.
Squeeze trigger slowly to make sure mixture has entered combustor before firing.
Pressure too low.
Check regulator and make sure the PSI reading is at least 20. Anything below 20 PSI will damage the heat gun
Trigger not fully released.
Release both the safety and the trigger to make sure the igniter is reset
Spark plug gap to small/big.
Open the spark plug gap to 3mm (about the same thickness as a nickel).
Defective igniter or connections.
Disconnect from fuel source and check for a spark or return for service
No click from trigger.
Replace trigger. It is a good idea at this time to replace all o-rings.
Gas timing screw needs adjustment.
With the gas on, turn the #16 screw clockwise until the gas begins to flow. Then back off the screw until the gas stops even when light pressure is exerted on the trigger without actuating the safety. (This suggestion is recommended for authorized service technicians only).

Combustor turns red (insufficient air flow).

Wrong fuel.
Make sure you have a vapor withdrawal propane tank (similar to a BBQ grill tank). Do not use liquid propane tanks (similar to fork truck tanks). Propane and natural gas are the only approved fuels for use with the heat tools.
Tank has ice build up or the tank pressure is below 20 PSI
Propane is low so change the tank. Change tank to allow iced tank to thaw.
Excess flow check valve not open.
Open tank valve and wait 10 to 30 seconds. You should hear a faint click in the POL when ready. This allows the hose to pressurize properly before using the heat tool.
Clogged orifice or filter.
Remove items and clean with compressed air or replace.
Clogged hose.
Blow out with air or replace
Clogged fuel line.
Blow out or replace

Large flame (fuel flow).

Leak in orifice assembly.
Tighten orifice in holder or replace.
Wrong pressure.
Make sure pressure gauge is between 20-30 PSI (factory preset to 22 PSI).
Line clog.
Clear the hose, fuel line, valve and filter of debris.
Worn or damaged O-rings.
Replace all o-rings.

Tool shuts off after short burst of ignition.

Excess flow check valve not open.
Open tank valve and wait 10 to 30 seconds. You should hear a faint click on the POL when ready. This allows the hose to pressurize properly before using the heat tool.

When the trigger is released the tool continues to fire or gas continues to leak.

Worn valve.
998- replace valve 975- replace or rebuild valve

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