This is a replacement Hayward Rear Wire Harness for H-Series Millivolt ED1 Style, Low NOx Induced Draft Heaters. This harness fits models: H250IDL2/H350IDL2/H400IDL2 Pool and Spa/Hot Tub Heaters and Millivolt H150/H200/H210/H250/H300/H350/H400 Pool and Spa/Hot Tub Heaters.








