Hi there,
I have a 4-year of Mastertemp 400. Recently, we discover a family of mice were living in the heater and had urinated all over the control boards internally. The heater would turn on, the blow would turn on, and then the heater would fail to light and eventually light of the 'Service Heater' light. No service codes. I had a service tech come out and they replaced the internal Fenwal Ignition System and replaced the thermal regulator while we were at it. It was back up and running with no issue.
Fast forward 3 weeks again, I turned the heater on to use with the spa and it did the same thing, Service Heater. I opened it up to discover the mice had made this their home again! Well, I took care of the mice problem. I replaced the Fenwal Ignition System again because it was covered in mice urine. But this time it didn't solve my issue.
I noticed after a few days of trying, that the pool heater would light up on the first attempt of the day. That is, it sits overnight and its not used. I go out in the morning, turn the heater on, it lights up and runs fine. When it gets to temperature (100F) it shuts off as per my setting in EasyTouch Panel. However, at the point, the heater won't re-ignite no matter what I do, and eventually the Service Heater light comes back on. I check the internal box and I'm getting a LED light of 2 flashes 'Flame No Call for Heat' when this occurs.
I just replaced the Hot Surface Ignitor thinking this is was the issue and it exhibits the same issue. It will light the first time, stay on until it hits temperature, and then when the spa calls for heat again after cooling off the heater won't reignite.
What else can I replace on this to make it work? None of the wires look chewed on.
I have High Limit Switch, Automatic Gas Shutoff, and a new control board on order to see if this will fix the issue.
Is it possible I have water in the combustion chamber and if I do, is that fixable?
Thanks!
I have a 4-year of Mastertemp 400. Recently, we discover a family of mice were living in the heater and had urinated all over the control boards internally. The heater would turn on, the blow would turn on, and then the heater would fail to light and eventually light of the 'Service Heater' light. No service codes. I had a service tech come out and they replaced the internal Fenwal Ignition System and replaced the thermal regulator while we were at it. It was back up and running with no issue.
Fast forward 3 weeks again, I turned the heater on to use with the spa and it did the same thing, Service Heater. I opened it up to discover the mice had made this their home again! Well, I took care of the mice problem. I replaced the Fenwal Ignition System again because it was covered in mice urine. But this time it didn't solve my issue.
I noticed after a few days of trying, that the pool heater would light up on the first attempt of the day. That is, it sits overnight and its not used. I go out in the morning, turn the heater on, it lights up and runs fine. When it gets to temperature (100F) it shuts off as per my setting in EasyTouch Panel. However, at the point, the heater won't re-ignite no matter what I do, and eventually the Service Heater light comes back on. I check the internal box and I'm getting a LED light of 2 flashes 'Flame No Call for Heat' when this occurs.
I just replaced the Hot Surface Ignitor thinking this is was the issue and it exhibits the same issue. It will light the first time, stay on until it hits temperature, and then when the spa calls for heat again after cooling off the heater won't reignite.
What else can I replace on this to make it work? None of the wires look chewed on.
I have High Limit Switch, Automatic Gas Shutoff, and a new control board on order to see if this will fix the issue.
Is it possible I have water in the combustion chamber and if I do, is that fixable?
Thanks!