Description
What is included: Upgraded IQ 2020 Heater Relay Board w/ Jumpers & Shortened Screws for the front cover of the IQ2020
Description:
This IQ 2020 Heater Relay Board (for Hot Spring, Tiger River & Limelight) is the newest revision for the 2001-2009.5 IQ2020 Control Box. It’s upgraded design provides a more efficient method of connecting the heater’s power cord to this board, therefore, reducing fatigue on the two “beefed up” relays. The black wire from the heater’s power cord now connects into the H1 position on the large gray terminal block. The heater’s white wire (neutral) connects onto its own separate gray terminal block labeled H2. This will reduce stress on the relays and increase their lifespan due to better transfer of voltage. The ground wire connection remains the same. The incoming power wires and the black & white wire from the heater are inserted into the gray terminal blocks round holes by prying the gate open using a small screwdriver. This upgraded circuit board replaces the 1st, 2nd & 3rd generation boards in the IQ 2020 Control Box found in all 2001-2009.5 Hot Spring, 2001-2009 Tiger River, and 2008-2009 Limelight spa models.
Symptoms this part has failed:
• No power going to the heater even though the red HTR ON L.E.D. light is lit inside the IQ2020 control box.
• The heater board is charred on the front and/or the backside.
Note: In older control boxes, you may encounter that a chip on this new heater relay board prevents the metal guard from seating properly and it may need to be trimmed. Installation Instructions PDF for more details.
old part number, 74618 (Invensys circuitry)
Reference number(s): 1310801-1
This item replaces: 74618 (Invensys circuitry); 74556
Robin Cooper (verified owner) –
A+++
Benton (verified owner) –
Very good experience product worked great
Paul (verified owner) –
I reported the conditions of my relay board which was still under warranty, and was issued an RMA right away. A very satisfying experience.
Lori (verified owner) –
BEST COMPANY EVER!! Outstanding customer support and defiantly know their products. They were able to walk me through how to install the part with ease. I’m a customer for life!!
Tammy (verified owner) –
You and your technical help is amazing, I struggled with heating issue and boards for almost a year of trial and error until I found you guys. Advised by you that I should replace both boards because new board my not communicate with the old one. BINGO!!!! 100% correct working correctly now. Thanks so much your site is amazing for the do it yourselfer. Love it!
Anonymous –
Regarding this specific part — I had a 2006 model and the board was a different design but 100% fit with no problems — The thing to test is ifs your HTR led is on there should be voltage (128v AC in my case) switched to the heater unit (the cables to the left of the board) — mine registers about 2v AC so I suspected it was this board. I replaced it you could see the charring on the backside and the new board is now happily working great (the front of the board looked fine)
These boards have relays that have a limited life span so it’s not a surprise that after 18 years of more or less continuous use it would fail (possibly also there is a design issue with orders ones — the new design is 100% compatible but different enough to make me think they re-designed it to be more robust)
Anonymous –
Hope it stays good for another 5 years
Amy –
Shipping was very quick! Which was great because it is hard to not have my hot tub working