work on 2 ton heatpump comfort maker yesterday, found unit stay in the cool mode, with t- stat calling for heat.( heat and cool work together)
switch O and B terminal at t-stat,RV still doing a/c, knock on RV a few time it does't make any different.
checked the charging on a/c mode was correct, RV making one click clear noise ,it look like working as it should, switch RV wire at defrost board it does't help either.
called boss, said replaced the RV ,its bad.
so i think it may be something else i can try to get it work correctly before i change the RV.
any idea guys,
will appreciate any comment thanks.