Trane CNT4821 Limit Switch 321894-706 converting 120 Vac primary input

converting 120 Vac primary input into reliable 24 Vac secondary output

If one cell has failed due to age or stress

Common indicators include a persistent humming sound without the fan spinning

This kit is focused on the gas delivery side

Can this valve be used in bi-directional flow applications

Trane CNT4821 Limit Switch 321894-706 converting 120 Vac primary inputThe Trane CNT4821 Limit Switch is a high reliability safety component engineered for precision thermal monitoring in furnaces and air handlers. Featuring a 180F Auto Reset bi metal disc mechanism, this switch serves as a critical fail safe by opening the electrical circuit when internal plenum temperatures exceed safe operational limits. Once the temperature descends below the reset threshold (typically 160F), the bi metal disc automatically returns