Master Temp doesn't ignite

[bigdav160]

My heater is about a year old. Perhaps 50-60 hours of run time.

I tried to heat the spa today and the inducer fan comes on, the LED flashes for heat then I get a Service Heater light. No LED on the inside panel.
My gas meter is 4 ft away and I see no movement on the meter.

If I'm checking it correctly, I don't seem to be getting 24v to the gas valve. Does this mean my control board is bad? Is this a common failure?

Is there another item to check?

TIA

 

[ps0303]

Remove the front and back covers and then remove the top, flip it over and see what LED(s) are lit when it fails.

 

[Pool Clown]

You should get voltage to the gas valve only after you hear the click (about 15 seconds after the fan/blower starts) and will be present only for a couple of seconds if there is no ignition. If you are getting voltage, but no ign, then the HSI is out (cracked), and will need to be replaced.

 

[bigdav160]

Sorry for the delay. My day job has been criminally busy.

I do have an LED on the control board - AGS

Can I bypass this switch, as a test, to see if the heater fires up?

TIA

 

[Pool Clown]

Those things very rarely go out. I would look for chewed wires (rats/mice). You can jump it, but turn the heater back off as soon as if fires, your test is over. You never want to run the heater without ALL the safety switches working.

 

[bigdav160]

I jumpered the switch and the heater fired right up.

The new switch should be here Monday.