Pentair minimax nt std 400K btu won't work....

doggdocAugust 21, 2010

fan comes on, but then nothing happens, then fan shuts off. no gas smell.

error code 1 - 1 blink on the LED inside. i have teh older model - the STD model - the one that doesn't have all the fancy temp numbers and error code fault numbers displayed.

i think this has to do with air flow...not sure what to do.

racket and repair guy, please help.

thanks in advance


Thank you for reporting this comment. Undo

The fan coming on indicates you have no issues with the temp sensor, etc. There is a call for heat and the fan is responding. If the fan is running the logical next step is the vacuum switch would close and the ignitor would glow. Take it from there. When the fan kicks on, do you hear an audible click of the gas valve after a few seconds? If so, that will tell you where to go next. A click means you are actually getting the valve to open and the problem may lie in a plugged burner of a fan turning too fast. Too fast will suck the gas off the ignitor. If there is no click, ensure the fan tube is not chewed by rodents. You can remove the two screws on the vent plate and then pop the corners on the top to lift off the top. If the tube has a hole in it, the vacuum switch can't close and call for ignition. If the tube is good, the next step is the vacuum switch itself. It may be stuck open. Bypass it, restart the heater and see if it fires. Any of these obvious items not working should result in a call to a tech to fully test the heater. Items such as a weak ignitor, bad ground, poor gas pressure, etc should be checked.

Of course, before all of the above, make sure the gas is ON. The part mentioned about the fan spinning too fast is noteworthy. Have you had the fan replaced recently? Maybe it was the wrong part number. A quick test for any NT doing this is to power the heat down, cover half of the vent with a brick or toolbox and fire it off. What you will do is restrict the exhaust potential of the fan and keep the gas on the ignitor. If it fires, clear the vent and replace the fan assembly. They will periodically wear to a point of spinning too fast.

    Bookmark   August 23, 2010 at 11:09PM
Sign Up to comment
More Discussions
Remounting aluminum track for a cover in a salt water pool
I've got a CoverPools automatic cover for my saltwater...
Pool resurface question
I am having my pool resurfaced and the supplies were...
Atlantis pool and spa (Magnolia Tx) anyone have any feedback?
Searching for a pool builder and looks like Atlantis...
I will answer pool plaster questions
For 23 years I was in the swimming pool plaster industry...
Owner Builder Process - Full Backyard - San Diego
After years of research, we finally pulled the trigger...
David Peace
Sponsored Products
Smart Spa Hot Tubs & Accessories Proline 50 sq. ft. Filter Cartridge for
$22.99 | Home Depot
Smart Spa Hot Tubs & Accessories Proline 35 sq. ft. Filter Cartridge for
$22.55 | Home Depot
Pentair Replacement Cartridge for S7M120 300 Sq. Ft. - NFS200S
$199.99 | Hayneedle
Pentair Replacement Cartridge for S8M150 450 Sq. Ft. - NFS202S
$229.99 | Hayneedle
© 2015 Houzz Inc. Houzz® The new way to design your home™