I have a Laars LT low nox pool heater (>2003 model) - heater won't work.
Between myself and one pool serviceman troubleshooted the heater but still can't figure out what is wrong. Perhaps someone can help!? Here is the issue:
We followed the following appropriate manual (see link) on page 16 and 17 --- http://www.victormfg.com/_build/docs...tingGuides.pdf
(this is the laars LT low nox pool heater troubleshooting manual)
steps 1, 2, and 3 are fine
step 4 - fan is on, yes.
says skip to step 5.
step 5, yes, working (24 vac purple wire at both ignition and ignition control terminal are fine)
hot surface ignitor glowing? No.
turned power off - ohm test 60 ohms - confirms working
which suggests ignition control is faulty.
I purchased $200 exact model and replaced. However, still NO change.
I turn on for heat - and fan turns on, I hear click, gas turns on... but again, burners do not turn on and it recycles these steps x 3 and then turns off.
So... I then (just in case) replaced the HSI (hot surface ignitor) with brand new one.
Again, NO change in above pattern.
I nor the pool serviceman was able to find a 'short' anywhere.
Any suggestions please??