Enrique

Just double checking before I open the tub 4 wires to the pump: red/black/green/white white= common green= ground red speed 1 , black speed 2 [or viceversa] I should be reading in the pack (disconnecting the pump1) Low speed: Voltage between red/black & white =220V black/red & white =0V High speed: Voltage between black/red & white =220V red/black & white =0V If I read 220V between red & white and black & white at the same time then it's probably a relay in the pack, right? Or should I be reading red-green/black-green? Thanks!

Buzzing sounds, Ill take a video shortly (-20F today - so I may wait until it warms up a little) Ill check the power thanks I just replaced all the big relays on the board [previous issue with no heat]. Unless one has gone bad fairly quick (all replaced 3 months ago) or may be one of the small relays (small relays did not get replaced). Will report back, thanks!

thanks, Ill try that pump #1 has two speeds: low and high Low speed is used to circulate (no dedicated circulation pump I don't think). In other words, I can see the shaft of pump#1 moving in low speed when the hot tub needs circulation of water (for heating and filtering) It is when I press the button in Jet1 (which triggers high speed in pump1) when I hear the humming noise for like 2 sec and the entire pump#1 shuts down for like 20-30 sec (I guess that is the thermal safety?). After those 30 sec, when heating is needed, the pump starts running in low no problem.

The humming noise makes me think that it may be the pump capacitor. Now the question is: the running capacitor (on the top of the pump)? OR the starting capacitor (on the side of the pump)? The pump does move and its not seized Thanks!

Hi, I have a 7-person California Cooperage Hot tub similar to this Everything was working fine a week ago, 3 days ago I went to the tub and the Jet1 button didn't work The hot tube has 2 pumps (Pump#1 and Paump#2). Pump#1 has two speed modes: slow and fast (mode is changed by pressing the same button) The hotub currently circulates and heats water. However, when I press the button for Jet1 (which controls pump#1) I hear a humming noise for like 1 sec and then the pump shuts down. Buttons for pump#1 becomes unresponsive and after a while the pump reactivates and circulates water again at low speed. After restarting the pump several times and try to activate pump#1. I got an error message of 'heater may be dry'. There is no issues with pump#2. Do you think it is the starting capacitor? If so, why does it run in slow but not in fast? PS: its -15F here, is this something I should attempt to fix when it's warmer? Pump looks like this: Board is a Balboa MXBP501X PN 56549-01 pack Thanks!!

Just posting an update. I ended up replacing all the 5 relays in the main board (HF2150-1A-12DEF) as suggested ($1.12/relay fix). It got fixed, I can read voltage on the 2 terminals of the heating element and the hot tub has warmed up tot he correct settings. My guess is that it was the two Hongfa relays near the heating element port. But replaced all 5 just in case. Thanks for the help!

Thanks, if you were to guess: are the pump ones the small ones or still the big ones?, I'm guessing K2, K6? I'm having a similar problem as stated in this forum. Instead of no heat - I get very little heat only 2-3 degrees every eight hours. Reading 0V between heater terminals and the resistance when connected seemed ok. I got a hot tub tech checking it for me and he recommended a replacement for the board. So I was going to swap the relays myself before swapping the entire board.

@RDspaguy Which one is the thermostat relay in the board? (K1, K3 or K5)? I'm guessing it's one of the three that are close to the heater terminal Thanks!