Well, I did a quick search and can’t seem to find an official troubleshooting manual on the ST60, but another model indicates it could be gas starvation or even air that hasn’t purged from the line. I would think that this would only be likely to happen on the first attempt after turning the gas on, on a given trip.
As far as the activation concern, this type of heater requires a minimum flow demand (measured by an internal flow sensor) to fire, I am seeing flow rates listed anywhere from .5 to .75 gallons per minute, so my guess is the flow rate of the kitchen faucet doesn’t meet the flow requirement by itself and the additional flow from the bathroom sink gets things to fire off. Wondering as an test, if you remove the kitchen nozzle, and
Well, I did a quick search and can’t seem to find an official troubleshooting manual on the ST60, but another model indicates it could be gas starvation or even air that hasn’t purged from the line. I would think that this would only be likely to happen on the first attempt after turning the gas on, on a given trip.
As far as the activation concern, this type of heater requires a minimum flow demand (measured by an internal flow sensor) to fire, I am seeing flow rates listed anywhere from .5 to .75 gallons per minute, so my guess is the flow rate of the kitchen faucet doesn’t meet the flow requirement by itself and the additional flow from the bathroom sink gets things to fire off. Wondering as an test, if you remove the kitchen nozzle, and let the hose free flow if it will fire off. This would validate my theory if the hose can free flow the needed gpm without the nozzle in place.
I live in mine full time so the problem is a everyday nuisance. Any tips on purging the lines of air, or would it be purged already after I've used propane stove? Check the flow rate with a manometer? Maybe pick a high flow faucet for the kitchen sink?