Handee

Did what you suggested but still no LEDs were on! In fact while checking, the "E01" returned intermittently. ....BUT, I thought you might like to know, we did find the problem with closer and more observation! It wasn't a bad board, or mice, or a bad part! Serious aggresive probing and reseating exercise produced results. What we found might answer the strange results and flowchart confusion. (no lites, etc.) Down in the control box, on the Ignition Control Module, (where the "diagnostic lite" is), I found not one, but TWO wires that fell right off at the crimp to the connector while being touched. (clean cut break, corroded). Stripped and re-terminated wires and heater working fine. The wires were the "IND" and "TH" to the Operating Control board. Thanks for all your time and advice. Handee

Thanks...Didn't know Pentair would talk to us about failure! Will look for main number and might try that tomorrow. Unfortunately, that price WAS an "online" price! Anyway, symptoms now driving us crazy. Have tried to start from scratch lots of times to produce failure correctly.(breaker off to drain, then on, then power up heater) Also tried breaker off, unplug all connectors and then restore connectors.) Most times, have symptoms as recently stated. Once, fan ran for about 30 seconds and then..heater failed w/no lites except service. Another time we even got the "E01" code back by doing nothing but waiting 10 minutes after service lite failure, (can't reproduce the "E01 since then). Searching for best price for board right now............

Pool Clown: Thanks for your info. Replaced sensor. "E01" not occuring now. BUT....Still have "service heater" lite on. Following the flow-chart in the owner's manual checks the LEDs first, (no red lights), then asks if blower is running, (it is not). At this point, the flow chart stops and says "replace control board". If I had the luxury of swapping parts in and out, this would be fine, but this next step means spending $300+. This brings some questions to my mind..Is the blower getting voltage?; Is it bound or blocked?; Is the AFS working correctly? (I don't hear the blower.) I ask myself, "Is there something else I can check?" - ETC. We've visually inspected this board, cables, connectors, etc. and reseated connectors and see no problems. Going to check out the blower and its motor a little more, (when the rain stops!), and see what I can prove before ordering board. I'm open to any suggestions on any steps I can take to check further than the flow-chart info. Thanks!

Pool Clown: Took your advice and removed sensor. Looks fine. No splits or cracks. Measures open w/meter. But, would it be a valid test to try starting the heater up with the the two wires removed from the sensor, jumpered (shorted) together to simulate the sensor being there? (Just to see if it gets past the immediate "E01"? Handee

Pool Clown, GREAT! You've given me a good start to finding the problem. I like to do all my own repairs. (on everything!) I'm not a pool guy, but, I've got alot of background in electronics, computers and networking. (about 40 years) I'm going to go out there with my Fluke meter and see if I can prove it before I lay out the money. Thank you for your time, I'll let you know what I find. Handee

Pool clown: Thanks. I've been trying do find some reference for the error codes that come up. Could you tell me where you got the info? Since I don't have a manual, where is the thermistor located? Do you also know the best place to get one? (Sorry...I'm full of questions today!) Thanks, Handee

Anyone have an idea what error code "E01" is indicating. After winter layup, Sta-Rite SR400LP heater won't fire up. Getting "E01" on display. Have had a mice problem a couple of years ago and rewired harness to main board and encapsulated all wiring to prevent reoccurrence. Also taking extreme preventive measures every winter,(mesh wrap, pellets, blocking vents, etc.), and so far, everything still looks good. No indications that any little creatures were in the heater. Is there a diagnostic manual or an Error code list available? Need a starting point to diagnose problem.